diff --git a/.gitignore b/.gitignore
index 11fb6d6..a035c2b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,4 +11,5 @@
 user_guide_src/build/*
 user_guide_src/cilexer/build/*
 user_guide_src/cilexer/dist/*
-user_guide_src/cilexer/pycilexer.egg-info/*
\ No newline at end of file
+user_guide_src/cilexer/pycilexer.egg-info/*
+/vendor/
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index 31b74b1..62acf05 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,11 @@
 php:
   - 5.3
   - 5.4
+  
+services:
+  - mysql
+  - postgresql
+  - sqlite
 
 env:
   - DB=mysql
@@ -23,4 +28,5 @@
 
 branches:
   only:
-    - develop
\ No newline at end of file
+    - develop
+    - /^feature\/.+$/
\ No newline at end of file
diff --git a/DCO.txt b/DCO.txt
new file mode 100644
index 0000000..a404c0d
--- /dev/null
+++ b/DCO.txt
@@ -0,0 +1,25 @@
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(1)	The contribution was created in whole or in part by me and I
+	have the right to submit it under the open source license
+	indicated in the file; or
+
+(2)	The contribution is based upon previous work that, to the best
+	of my knowledge, is covered under an appropriate open source
+	license and I have the right under that license to submit that
+	work with modifications, whether created in whole or in part
+	by me, under the same open source license (unless I am
+	permitted to submit under a different license), as indicated
+	in the file; or
+
+(3)	The contribution was provided directly to me by some other
+	person who certified (1), (2) or (3) and I have not modified
+	it.
+
+(4)	I understand and agree that this project and the contribution
+	are public and that a record of the contribution (including all
+	personal information I submit with it, including my sign-off) is
+	maintained indefinitely and may be redistributed consistent with
+	this project or the open source license(s) involved.
diff --git a/application/.htaccess b/application/.htaccess
index 14249c5..6c63ed4 100644
--- a/application/.htaccess
+++ b/application/.htaccess
@@ -1 +1,6 @@
-Deny from all
\ No newline at end of file
+<IfModule authz_core_module>
+    Require all denied
+</IfModule>
+<IfModule !authz_core_module>
+    Deny from all
+</IfModule>
\ No newline at end of file
diff --git a/application/cache/.htaccess b/application/cache/.htaccess
index 3418e55..6c63ed4 100644
--- a/application/cache/.htaccess
+++ b/application/cache/.htaccess
@@ -1 +1,6 @@
-deny from all
\ No newline at end of file
+<IfModule authz_core_module>
+    Require all denied
+</IfModule>
+<IfModule !authz_core_module>
+    Deny from all
+</IfModule>
\ No newline at end of file
diff --git a/application/config/autoload.php b/application/config/autoload.php
index b3e63cb..ff153fb 100644
--- a/application/config/autoload.php
+++ b/application/config/autoload.php
@@ -46,10 +46,11 @@
 |
 | 1. Packages
 | 2. Libraries
-| 3. Helper files
-| 4. Custom config files
-| 5. Language files
-| 6. Models
+| 3. Drivers
+| 4. Helper files
+| 5. Custom config files
+| 6. Language files
+| 7. Models
 |
 */
 
@@ -75,7 +76,7 @@
 |
 | Prototype:
 |
-|	$autoload['libraries'] = array('database', 'session', 'xmlrpc');
+|	$autoload['libraries'] = array('database', 'email', 'xmlrpc');
 */
 
 $autoload['libraries'] = array();
@@ -83,6 +84,22 @@
 
 /*
 | -------------------------------------------------------------------
+|  Auto-load Drivers
+| -------------------------------------------------------------------
+| These classes are located in the system/libraries folder or in your
+| application/libraries folder within their own subdirectory. They
+| offer multiple interchangeable driver options.
+|
+| Prototype:
+|
+|	$autoload['drivers'] = array('session', 'cache');
+*/
+
+$autoload['drivers'] = array();
+
+
+/*
+| -------------------------------------------------------------------
 |  Auto-load Helper Files
 | -------------------------------------------------------------------
 | Prototype:
@@ -139,4 +156,4 @@
 
 
 /* End of file autoload.php */
-/* Location: ./application/config/autoload.php */
\ No newline at end of file
+/* Location: ./application/config/autoload.php */
diff --git a/application/config/config.php b/application/config/config.php
index 726e3a7..eaccbf7 100644
--- a/application/config/config.php
+++ b/application/config/config.php
@@ -265,6 +265,9 @@
 | Session Variables
 |--------------------------------------------------------------------------
 |
+| 'sess_driver'				= the driver to load: cookie (Classic), native (PHP sessions),
+|	or your custom driver name
+| 'sess_valid_drivers'		= additional valid drivers which may be loaded
 | 'sess_cookie_name'		= the name you want for the cookie
 | 'sess_expiration'			= the number of SECONDS you want the session to last.
 |   by default sessions last 7200 seconds (two hours).  Set to zero for no expiration.
@@ -278,6 +281,8 @@
 | 'sess_time_to_update'		= how many seconds between CI refreshing Session Information
 |
 */
+$config['sess_driver']			= 'cookie';
+$config['sess_valid_drivers']	= array();
 $config['sess_cookie_name']		= 'ci_session';
 $config['sess_expiration']		= 7200;
 $config['sess_expire_on_close']	= FALSE;
@@ -300,9 +305,9 @@
 | 'cookie_httponly' = Cookie will only be accessible via HTTP(S) (no javascript)
 |
 */
-$config['cookie_prefix']	= "";
-$config['cookie_domain']	= "";
-$config['cookie_path']		= "/";
+$config['cookie_prefix']	= '';
+$config['cookie_domain']	= '';
+$config['cookie_path']		= '/';
 $config['cookie_secure']	= FALSE;
 $config['cookie_httponly'] 	= FALSE;
 
diff --git a/application/config/constants.php b/application/config/constants.php
index d22d296..62a18e7 100644
--- a/application/config/constants.php
+++ b/application/config/constants.php
@@ -52,14 +52,14 @@
 |
 */
 
-define('FOPEN_READ',							'rb');
-define('FOPEN_READ_WRITE',						'r+b');
-define('FOPEN_WRITE_CREATE_DESTRUCTIVE',		'wb'); // truncates existing file data, use with care
-define('FOPEN_READ_WRITE_CREATE_DESTRUCTIVE',	'w+b'); // truncates existing file data, use with care
-define('FOPEN_WRITE_CREATE',					'ab');
-define('FOPEN_READ_WRITE_CREATE',				'a+b');
-define('FOPEN_WRITE_CREATE_STRICT',				'xb');
-define('FOPEN_READ_WRITE_CREATE_STRICT',		'x+b');
+define('FOPEN_READ', 'rb');
+define('FOPEN_READ_WRITE', 'r+b');
+define('FOPEN_WRITE_CREATE_DESTRUCTIVE', 'wb'); // truncates existing file data, use with care
+define('FOPEN_READ_WRITE_CREATE_DESTRUCTIVE', 'w+b'); // truncates existing file data, use with care
+define('FOPEN_WRITE_CREATE', 'ab');
+define('FOPEN_READ_WRITE_CREATE', 'a+b');
+define('FOPEN_WRITE_CREATE_STRICT', 'xb');
+define('FOPEN_READ_WRITE_CREATE_STRICT', 'x+b');
 
 /*
 |--------------------------------------------------------------------------
diff --git a/application/config/database.php b/application/config/database.php
index cb6ebad..4c5cad0 100644
--- a/application/config/database.php
+++ b/application/config/database.php
@@ -42,8 +42,9 @@
 |	['username'] The username used to connect to the database
 |	['password'] The password used to connect to the database
 |	['database'] The name of the database you want to connect to
-|	['dbdriver'] The database type. e.g.: mysql.  Currently supported:
-|				 cubrid, interbase, mssql, mysql, mysqli, oci8,
+|	['dbdriver'] The database driver. e.g.: mysqli.
+			Currently supported:
+|				 cubrid, ibase, mssql, mysql, mysqli, oci8,
 |				 odbc, pdo, postgre, sqlite, sqlite3, sqlsrv
 |	['dbprefix'] You can add an optional prefix, which will be added
 |				 to the table name when using the  Query Builder class
@@ -62,6 +63,7 @@
 | 				 Sites using Latin-1 or UTF-8 database character set and collation are unaffected.
 |	['swap_pre'] A default table prefix that should be swapped with the dbprefix
 |	['autoinit'] Whether or not to automatically initialize the database.
+|	['compress'] Whether or not to use client compression (only MySQL and MySQLi)
 |	['stricton'] TRUE/FALSE - forces 'Strict Mode' connections
 |							- good for ensuring strict SQL while developing
 |	['failover'] array - A array with 0 or more data for connections if the main should fail.
@@ -92,6 +94,7 @@
 	'dbcollat' => 'utf8_general_ci',
 	'swap_pre' => '',
 	'autoinit' => TRUE,
+	'compress' => TRUE,
 	'stricton' => FALSE,
 	'failover' => array()
 );
diff --git a/application/config/mimes.php b/application/config/mimes.php
index 4b1d6a8..90ffe61 100644
--- a/application/config/mimes.php
+++ b/application/config/mimes.php
@@ -37,7 +37,7 @@
 return array(
 	'hqx'	=>	array('application/mac-binhex40', 'application/mac-binhex', 'application/x-binhex40', 'application/x-mac-binhex40'),
 	'cpt'	=>	'application/mac-compactpro',
-	'csv'	=>	array('text/x-comma-separated-values', 'text/comma-separated-values', 'application/octet-stream', 'application/vnd.ms-excel', 'application/x-csv', 'text/x-csv', 'text/csv', 'application/csv', 'application/excel', 'application/vnd.msexcel'),
+	'csv'	=>	array('text/x-comma-separated-values', 'text/comma-separated-values', 'application/octet-stream', 'application/vnd.ms-excel', 'application/x-csv', 'text/x-csv', 'text/csv', 'application/csv', 'application/excel', 'application/vnd.msexcel', 'text/plain'),
 	'bin'	=>	array('application/macbinary', 'application/mac-binary', 'application/octet-stream', 'application/x-binary', 'application/x-macbinary'),
 	'dms'	=>	'application/octet-stream',
 	'lha'	=>	'application/octet-stream',
@@ -49,14 +49,14 @@
 	'sea'	=>	'application/octet-stream',
 	'dll'	=>	'application/octet-stream',
 	'oda'	=>	'application/oda',
-	'pdf'	=>	array('application/pdf', 'application/x-download'),
+	'pdf'	=>	array('application/pdf', 'application/x-download', 'binary/octet-stream'),
 	'ai'	=>	'application/postscript',
 	'eps'	=>	'application/postscript',
 	'ps'	=>	'application/postscript',
 	'smi'	=>	'application/smil',
 	'smil'	=>	'application/smil',
 	'mif'	=>	'application/vnd.mif',
-	'xls'	=>	array('application/excel', 'application/vnd.ms-excel', 'application/msexcel'),
+	'xls'	=>	array('application/vnd.ms-excel', 'application/msexcel', 'application/x-msexcel', 'application/x-ms-excel', 'application/x-excel', 'application/x-dos_ms_excel', 'application/xls', 'application/x-xls', 'application/excel', 'application/download', 'application/vnd.ms-office', 'application/msword'),
 	'ppt'	=>	array('application/powerpoint', 'application/vnd.ms-powerpoint'),
 	'pptx'	=> 	'application/vnd.openxmlformats-officedocument.presentationml.presentation',
 	'wbxml'	=>	'application/wbxml',
@@ -123,8 +123,10 @@
 	'avi'	=>	array('video/x-msvideo', 'video/msvideo', 'video/avi', 'application/x-troff-msvideo'),
 	'movie'	=>	'video/x-sgi-movie',
 	'doc'	=>	array('application/msword', 'application/vnd.ms-office'),
-	'docx'	=>	array('application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/zip'),
-	'xlsx'	=>	array('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'application/zip'),
+	'docx'	=>	array('application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/zip', 'application/msword'),
+	'dot'	=>	array('application/msword', 'application/vnd.ms-office'),
+	'dotx'	=>	array('application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/zip', 'application/msword'),
+	'xlsx'	=>	array('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'application/zip', 'application/vnd.ms-excel', 'application/msword'),
 	'word'	=>	array('application/msword', 'application/octet-stream'),
 	'xl'	=>	'application/excel',
 	'eml'	=>	'message/rfc822',
diff --git a/application/config/user_agents.php b/application/config/user_agents.php
index 416ef56..78e4c8c 100644
--- a/application/config/user_agents.php
+++ b/application/config/user_agents.php
@@ -36,6 +36,7 @@
 */
 
 $platforms = array(
+	'windows nt 6.2'	=> 'Windows 8',
 	'windows nt 6.1'	=> 'Windows 7',
 	'windows nt 6.0'	=> 'Windows Vista',
 	'windows nt 5.2'	=> 'Windows 2003',
@@ -146,6 +147,7 @@
 	'ipaq'			=> 'HP iPaq',
 	'mot-'			=> 'Motorola',
 	'playstation portable'	=> 'PlayStation Portable',
+	'playstation 3'		=> 'PlayStation 3',
 	'hiptop'		=> 'Danger Hiptop',
 	'nec-'			=> 'NEC',
 	'panasonic'		=> 'Panasonic',
@@ -155,10 +157,10 @@
 	'spv'			=> 'SPV',
 	'zte'			=> 'ZTE',
 	'sendo'			=> 'Sendo',
-	'dsi'			=> 'Nintendo DSi',
-	'ds'			=> 'Nintendo DS',
+	'nintendo dsi'	=> 'Nintendo DSi',
+	'nintendo ds'	=> 'Nintendo DS',
+	'nintendo 3ds'	=> 'Nintendo 3DS',
 	'wii'			=> 'Nintendo Wii',
-	'3ds'			=> 'Nintendo 3DS',
 	'open web'		=> 'Open Web',
 	'openweb'		=> 'OpenWeb',
 
diff --git a/application/views/errors/error_404.php b/application/views/errors/error_404.php
index c19bedf..fe48fd5 100644
--- a/application/views/errors/error_404.php
+++ b/application/views/errors/error_404.php
@@ -31,9 +31,9 @@
 <title>404 Page Not Found</title>
 <style type="text/css">
 
-::selection{ background-color: #E13300; color: white; }
-::moz-selection{ background-color: #E13300; color: white; }
-::webkit-selection{ background-color: #E13300; color: white; }
+::selection { background-color: #E13300; color: white; }
+::-moz-selection { background-color: #E13300; color: white; }
+::-webkit-selection { background-color: #E13300; color: white; }
 
 body {
 	background-color: #fff;
@@ -73,6 +73,8 @@
 	margin: 10px;
 	border: 1px solid #D0D0D0;
 	box-shadow: 0 0 8px #D0D0D0;
+	-moz-box-shadow: 0 0 8px #D0D0D0;
+	-webkit-box-shadow: 0 0 8px #D0D0D0;
 }
 
 p {
diff --git a/application/views/errors/error_db.php b/application/views/errors/error_db.php
index 3b244e0..76ca6df 100644
--- a/application/views/errors/error_db.php
+++ b/application/views/errors/error_db.php
@@ -31,9 +31,9 @@
 <title>Database Error</title>
 <style type="text/css">
 
-::selection{ background-color: #E13300; color: white; }
-::moz-selection{ background-color: #E13300; color: white; }
-::webkit-selection{ background-color: #E13300; color: white; }
+::selection { background-color: #E13300; color: white; }
+::-moz-selection { background-color: #E13300; color: white; }
+::-webkit-selection { background-color: #E13300; color: white; }
 
 body {
 	background-color: #fff;
@@ -73,6 +73,8 @@
 	margin: 10px;
 	border: 1px solid #D0D0D0;
 	box-shadow: 0 0 8px #D0D0D0;
+	-moz-box-shadow: 0 0 8px #D0D0D0;
+	-webkit-box-shadow: 0 0 8px #D0D0D0;
 }
 
 p {
diff --git a/application/views/errors/error_general.php b/application/views/errors/error_general.php
index c88afe1..e9baf16 100644
--- a/application/views/errors/error_general.php
+++ b/application/views/errors/error_general.php
@@ -31,9 +31,9 @@
 <title>Error</title>
 <style type="text/css">
 
-::selection{ background-color: #E13300; color: white; }
-::moz-selection{ background-color: #E13300; color: white; }
-::webkit-selection{ background-color: #E13300; color: white; }
+::selection { background-color: #E13300; color: white; }
+::-moz-selection { background-color: #E13300; color: white; }
+::-webkit-selection { background-color: #E13300; color: white; }
 
 body {
 	background-color: #fff;
@@ -73,6 +73,8 @@
 	margin: 10px;
 	border: 1px solid #D0D0D0;
 	box-shadow: 0 0 8px #D0D0D0;
+	-moz-box-shadow: 0 0 8px #D0D0D0;
+	-webkit-box-shadow: 0 0 8px #D0D0D0;
 }
 
 p {
diff --git a/application/views/welcome_message.php b/application/views/welcome_message.php
index 65f62a9..d227f82 100644
--- a/application/views/welcome_message.php
+++ b/application/views/welcome_message.php
@@ -32,9 +32,9 @@
 
 	<style type="text/css">
 
-	::selection{ background-color: #E13300; color: white; }
-	::moz-selection{ background-color: #E13300; color: white; }
-	::webkit-selection{ background-color: #E13300; color: white; }
+	::selection { background-color: #E13300; color: white; }
+	::-moz-selection { background-color: #E13300; color: white; }
+	::-webkit-selection { background-color: #E13300; color: white; }
 
 	body {
 		background-color: #fff;
@@ -70,11 +70,11 @@
 		padding: 12px 10px 12px 10px;
 	}
 
-	#body{
+	#body {
 		margin: 0 15px 0 15px;
 	}
 
-	p.footer{
+	p.footer {
 		text-align: right;
 		font-size: 11px;
 		border-top: 1px solid #D0D0D0;
@@ -83,9 +83,10 @@
 		margin: 20px 0 0 0;
 	}
 
-	#container{
+	#container {
 		margin: 10px;
 		border: 1px solid #D0D0D0;
+		-moz-box-shadow: 0 0 8px #D0D0D0;
 		-webkit-box-shadow: 0 0 8px #D0D0D0;
 	}
 	</style>
diff --git a/composer.json b/composer.json
index fa6dc02..dc098ac 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,8 @@
 {
     "require": {
         "mikey179/vfsStream": "*"
-    }
+    },
+    "require-dev": {
+		"EHER/PHPUnit": "*"
+	}
 }
\ No newline at end of file
diff --git a/contributing.md b/contributing.md
new file mode 100644
index 0000000..f3f94fb
--- /dev/null
+++ b/contributing.md
@@ -0,0 +1,92 @@
+# Contributing to CodeIgniter
+
+
+CodeIgniter is a community driven project and accepts contributions of code and documentation from the community. These contributions are made in the form of Issues or [Pull Requests](http://help.github.com/send-pull-requests/) on the [EllisLab CodeIgniter repository](https://github.com/EllisLab/CodeIgniter>) on GitHub.
+
+Issues are a quick way to point out a bug. If you find a bug or documentation error in CodeIgniter then please check a few things first:
+
+1. There is not already an open Issue
+2. The issue has already been fixed (check the develop branch, or look for closed Issues)
+3. Is it something really obvious that you fix it yourself?
+
+Reporting issues is helpful but an even better approach is to send a Pull Request, which is done by "Forking" the main repository and committing to your own copy. This will require you to use the version control system called Git.
+
+## Guidelines
+
+Before we look into how, here are the guidelines. If your Pull Requests fail
+to pass these guidelines it will be declined and you will need to re-submit
+when you’ve made the changes. This might sound a bit tough, but it is required
+for us to maintain quality of the code-base.
+
+### PHP Style
+
+All code must meet the [Style Guide](http://codeigniter.com/user_guide/general/styleguide.html), which is
+essentially the [Allman indent style](http://en.wikipedia.org/wiki/Indent_style#Allman_style), underscores and readable operators. This makes certain that all code is the same format as the existing code and means it will be as readable as possible.
+
+### Documentation
+
+If you change anything that requires a change to documentation then you will need to add it. New classes, methods, parameters, changing default values, etc are all things that will require a change to documentation. The change-log must also be updated for every change. Also PHPDoc blocks must be maintained.
+
+### Compatibility
+
+CodeIgniter is compatible with PHP 5.2.4 so all code supplied must stick to
+this requirement. If PHP 5.3 or 5.4 functions or features are used then there
+must be a fallback for PHP 5.2.4.
+
+### Branching
+
+CodeIgniter uses the [Git-Flow](http://nvie.com/posts/a-successful-git-branching-model/) branching model which requires all pull requests to be sent to the "develop" branch. This is
+where the next planned version will be developed. The "master" branch will always contain the latest stable version and is kept clean so a "hotfix" (e.g: an emergency security patch) can be applied to master to create a new version, without worrying about other features holding it up. For this reason all commits need to be made to "develop" and any sent to "master" will be closed automatically. If you have multiple changes to submit, please place all changes into their own branch on your fork.
+
+One thing at a time: A pull request should only contain one change. That does not mean only one commit, but one change - however many commits it took. The reason for this is that if you change X and Y but send a pull request for both at the same time, we might really want X but disagree with Y, meaning we cannot merge the request. Using the Git-Flow branching model you can create new branches for both of these features and send two requests.
+
+### Signing
+
+You must sign your work, certifying that you either wrote the work or otherwise have the right to pass it on to an open source project. git makes this trivial as you merely have to use `--signoff` on your commits to your CodeIgniter fork.
+
+`git commit --signoff`
+
+or simply
+
+`git commit -s`
+
+This will sign your commits with the information setup in your git config, e.g.
+
+`Signed-off-by: John Q Public <john.public@example.com>`
+
+If you are using [Tower](http://www.git-tower.com/) there is a "Sign-Off" checkbox in the commit window. You could even alias git commit to use the `-s` flag so you don’t have to think about it.
+
+By signing your work in this manner, you certify to a "Developer's Certificate of Origin". The current version of this certificate is in the `DCO.txt` file in the root of this repository.
+
+
+## How-to Guide
+
+There are two ways to make changes, the easy way and the hard way. Either way you will need to [create a GitHub account](https://github.com/signup/free).
+
+Easy way GitHub allows in-line editing of files for making simple typo changes and quick-fixes. This is not the best way as you are unable to test the code works. If you do this you could be introducing syntax errors, etc, but for a Git-phobic user this is good for a quick-fix.
+
+Hard way The best way to contribute is to "clone" your fork of CodeIgniter to your development area. That sounds like some jargon, but "forking" on GitHub means "making a copy of that repo to your account" and "cloning" means "copying that code to your environment so you can work on it".
+
+1. Set up Git (Windows, Mac & Linux)
+2. Go to the CodeIgniter repo
+3. Fork it
+4. Clone your CodeIgniter repo: git@github.com:<your-name>/CodeIgniter.git
+5. Checkout the "develop" branch At this point you are ready to start making changes. 
+6. Fix existing bugs on the Issue tracker after taking a look to see nobody else is working on them.
+7. Commit the files
+8. Push your develop branch to your fork
+9. Send a pull request [http://help.github.com/send-pull-requests/](http://help.github.com/send-pull-requests/)
+
+The Reactor Engineers will now be alerted about the change and at least one of the team will respond. If your change fails to meet the guidelines it will be bounced, or feedback will be provided to help you improve it.
+
+Once the Reactor Engineer handling your pull request is happy with it they will post it to the internal EllisLab discussion area to be double checked by the other Engineers and EllisLab developers. If nobody has a problem with the change then it will be merged into develop and will be part of the next release. Keeping your fork up-to-date
+
+Unlike systems like Subversion, Git can have multiple remotes. A remote is the name for a URL of a Git repository. By default your fork will have a remote named "origin" which points to your fork, but you can add another remote named "codeigniter" which points to `git://github.com/EllisLab/CodeIgniter.git`. This is a read-only remote but you can pull from this develop branch to update your own.
+
+If you are using command-line you can do the following:
+
+1. `git remote add codeigniter git://github.com/EllisLab/CodeIgniter.git`
+2. `git pull codeigniter develop`
+3. `git push origin develop`
+
+Now your fork is up to date. This should be done regularly, or before you send a pull request at least.
\ No newline at end of file
diff --git a/index.php b/index.php
index ad98013..107a209 100644
--- a/index.php
+++ b/index.php
@@ -43,6 +43,7 @@
  * NOTE: If you change these, also change the error_reporting() code below
  */
 	define('ENVIRONMENT', isset($_SERVER['CI_ENV']) ? $_SERVER['CI_ENV'] : 'development');
+
 /*
  *---------------------------------------------------------------
  * ERROR REPORTING
@@ -51,21 +52,22 @@
  * Different environments will require different levels of error reporting.
  * By default development will show errors but testing and live will hide them.
  */
-
-if (defined('ENVIRONMENT'))
+switch (ENVIRONMENT)
 {
-	switch (ENVIRONMENT)
-	{
-		case 'development':
-			error_reporting(-1);
-		break;
-		case 'testing':
-		case 'production':
-			error_reporting(0);
-		break;
-		default:
-			exit('The application environment is not set correctly.');
-	}
+	case 'development':
+		error_reporting(-1);
+		ini_set('display_errors', 1);
+	break;
+
+	case 'testing':
+	case 'production':
+		error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED ^ E_STRICT);
+		ini_set('display_errors', 0);
+	break;
+
+	default:
+		header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
+		exit('The application environment is not set correctly.');
 }
 
 /*
@@ -133,7 +135,7 @@
 	// if your controller is not in a sub-folder within the "controllers" folder
 	// $routing['directory'] = '';
 
-	// The controller class file name.  Example:  Mycontroller
+	// The controller class file name.  Example:  mycontroller
 	// $routing['controller'] = '';
 
 	// The controller function you wish to be called.
@@ -268,4 +270,4 @@
 require_once BASEPATH.'core/CodeIgniter.php';
 
 /* End of file index.php */
-/* Location: ./index.php */
\ No newline at end of file
+/* Location: ./index.php */
diff --git a/readme.rst b/readme.rst
index 7b718fe..8628645 100644
--- a/readme.rst
+++ b/readme.rst
@@ -38,138 +38,6 @@
 Please see the `installation section <http://codeigniter.com/user_guide/installation/index.html>`_
 of the CodeIgniter User Guide.
 
-************
-Contributing
-************
-
-CodeIgniter is a community driven project and accepts contributions of code
-and documentation from the community. These contributions are made in the form
-of Issues or `Pull Requests <http://help.github.com/send-pull-requests/>`_ on
-the `EllisLab CodeIgniter repository
-<https://github.com/EllisLab/CodeIgniter>`_ on GitHub.
-
-Issues are a quick way to point out a bug. If you find a bug or documentation
-error in CodeIgniter then please check a few things first:
-
-- There is not already an open Issue
-- The issue has already been fixed (check the develop branch, or look for
-  closed Issues)
-- Is it something really obvious that you fix it yourself?
-
-Reporting issues is helpful but an even better approach is to send a Pull
-Request, which is done by "Forking" the main repository and committing to your
-own copy. This will require you to use the version control system called Git.
-
-**********
-Guidelines
-**********
-
-Before we look into how, here are the guidelines. If your Pull Requests fail
-to pass these guidelines it will be declined and you will need to re-submit
-when you’ve made the changes. This might sound a bit tough, but it is required
-for us to maintain quality of the code-base.
-
-PHP Style
-=========
-
-All code must meet the `Style Guide
-<http://codeigniter.com/user_guide/general/styleguide.html>`_, which is
-essentially the `Allman indent style
-<http://en.wikipedia.org/wiki/Indent_style#Allman_style>`_, underscores and
-readable operators. This makes certain that all code is the same format as the
-existing code and means it will be as readable as possible.
-
-Documentation
-=============
-
-If you change anything that requires a change to documentation then you will
-need to add it. New classes, methods, parameters, changing default values, etc
-are all things that will require a change to documentation. The change-log
-must also be updated for every change. Also PHPDoc blocks must be maintained.
-
-Compatibility
-=============
-
-CodeIgniter is compatible with PHP 5.2.4 so all code supplied must stick to
-this requirement. If PHP 5.3 or 5.4 functions or features are used then there
-must be a fallback for PHP 5.2.4.
-
-Branching
-=========
-
-CodeIgniter uses the `Git-Flow
-<http://nvie.com/posts/a-successful-git-branching-model/>`_ branching model
-which requires all pull requests to be sent to the "develop" branch. This is
-where the next planned version will be developed. The "master" branch will
-always contain the latest stable version and is kept clean so a "hotfix" (e.g:
-an emergency security patch) can be applied to master to create a new version,
-without worrying about other features holding it up. For this reason all
-commits need to be made to "develop" and any sent to "master" will be closed
-automatically. If you have multiple changes to submit, please place all
-changes into their own branch on your fork.
-
-One thing at a time: A pull request should only contain one change. That does
-not mean only one commit, but one change - however many commits it took. The
-reason for this is that if you change X and Y but send a pull request for both
-at the same time, we might really want X but disagree with Y, meaning we
-cannot merge the request. Using the Git-Flow branching model you can create
-new branches for both of these features and send two requests.
-
-************
-How-to Guide
-************
-
-There are two ways to make changes, the easy way and the hard way. Either way
-you will need to `create a GitHub account <https://github.com/signup/free>`_.
-
-Easy way GitHub allows in-line editing of files for making simple typo changes
-and quick-fixes. This is not the best way as you are unable to test the code
-works. If you do this you could be introducing syntax errors, etc, but for a
-Git-phobic user this is good for a quick-fix.
-
-Hard way The best way to contribute is to "clone" your fork of CodeIgniter to
-your development area. That sounds like some jargon, but "forking" on GitHub
-means "making a copy of that repo to your account" and "cloning" means
-"copying that code to your environment so you can work on it".
-
-#. Set up Git (Windows, Mac & Linux)
-#. Go to the CodeIgniter repo
-#. Fork it
-#. Clone your CodeIgniter repo: git@github.com:<your-name>/CodeIgniter.git
-#. Checkout the "develop" branch At this point you are ready to start making
-   changes. 
-#. Fix existing bugs on the Issue tracker after taking a look to see nobody
-   else is working on them.
-#. Commit the files
-#. Push your develop branch to your fork
-#. Send a pull request http://help.github.com/send-pull-requests/
-
-The Reactor Engineers will now be alerted about the change and at least one of
-the team will respond. If your change fails to meet the guidelines it will be
-bounced, or feedback will be provided to help you improve it.
-
-Once the Reactor Engineer handling your pull request is happy with it they
-will post it to the internal EllisLab discussion area to be double checked by
-the other Engineers and EllisLab developers. If nobody has a problem with the
-change then it will be merged into develop and will be part of the next
-release. Keeping your fork up-to-date
-
-Unlike systems like Subversion, Git can have multiple remotes. A remote is the
-name for a URL of a Git repository. By default your fork will have a remote
-named "origin" which points to your fork, but you can add another remote named
-"codeigniter" which points to git://github.com/EllisLab/CodeIgniter.git. This
-is a read-only remote but you can pull from this develop branch to update your
-own.
-
-If you are using command-line you can do the following:
-
-#. git remote add codeigniter git://github.com/EllisLab/CodeIgniter.git
-#. git pull codeigniter develop
-#. git push origin develop
-
-Now your fork is up to date. This should be done regularly, or before you send
-a pull request at least.
-
 *******
 License
 *******
diff --git a/system/.htaccess b/system/.htaccess
index 14249c5..6c63ed4 100644
--- a/system/.htaccess
+++ b/system/.htaccess
@@ -1 +1,6 @@
-Deny from all
\ No newline at end of file
+<IfModule authz_core_module>
+    Require all denied
+</IfModule>
+<IfModule !authz_core_module>
+    Deny from all
+</IfModule>
\ No newline at end of file
diff --git a/system/core/Common.php b/system/core/Common.php
index c309d41..e449dd2 100644
--- a/system/core/Common.php
+++ b/system/core/Common.php
@@ -172,7 +172,7 @@
 		if ($name === FALSE)
 		{
 			// Note: We use exit() rather then show_error() in order to avoid a
-			// self-referencing loop with the Excptions class
+			// self-referencing loop with the Exceptions class
 			set_status_header(503);
 			exit('Unable to locate the specified class: '.$class.'.php');
 		}
@@ -488,13 +488,9 @@
 		{
 			header('Status: '.$code.' '.$text, TRUE);
 		}
-		elseif ($server_protocol === 'HTTP/1.0')
-		{
-			header('HTTP/1.0 '.$code.' '.$text, TRUE, $code);
-		}
 		else
 		{
-			header('HTTP/1.1 '.$code.' '.$text, TRUE, $code);
+			header(($server_protocol ? $server_protocol : 'HTTP/1.1').' '.$code.' '.$text, TRUE, $code);
 		}
 	}
 }
@@ -526,7 +522,8 @@
 
 		// Should we display the error? We'll get the current error_reporting
 		// level and add its bits with the severity bits to find out.
-		if (($severity & error_reporting()) === $severity)
+		// And respect display_errors
+		if (($severity & error_reporting()) === $severity && (bool) ini_get('display_errors') === TRUE)
 		{
 			$_error->show_php_error($severity, $message, $filepath, $line);
 		}
@@ -597,5 +594,44 @@
 	}
 }
 
+// ------------------------------------------------------------------------
+
+if ( ! function_exists('_stringify_attributes'))
+{
+	/**
+	 * Stringify attributes for use in HTML tags.
+	 *
+	 * Helper function used to convert a string, array, or object
+	 * of attributes to a string.
+	 *
+	 * @param	mixed	string, array, object
+	 * @param	bool
+	 * @return	string
+	 */
+	function _stringify_attributes($attributes, $js = FALSE)
+	{
+		$atts = NULL;
+
+		if (empty($attributes))
+		{
+			return $atts;
+		}
+
+		if (is_string($attributes))
+		{
+			return ' '.$attributes;
+		}
+
+		$attributes = (array) $attributes;
+
+		foreach ($attributes as $key => $val)
+		{
+			$atts .= ($js) ? $key.'='.$val.',' : ' '.$key.'="'.$val.'"';
+		}
+
+		return rtrim($atts, ',');
+	}
+}
+
 /* End of file Common.php */
 /* Location: ./system/core/Common.php */
\ No newline at end of file
diff --git a/system/core/Config.php b/system/core/Config.php
index 4b4e5a7..8e4f998 100644
--- a/system/core/Config.php
+++ b/system/core/Config.php
@@ -43,7 +43,7 @@
 	 *
 	 * @var array
 	 */
-	public $config =	array();
+	public $config = array();
 
 	/**
 	 * List of all loaded config files
@@ -103,12 +103,12 @@
 		$file = ($file === '') ? 'config' : str_replace('.php', '', $file);
 		$found = $loaded = FALSE;
 
+		$check_locations = defined('ENVIRONMENT')
+			? array(ENVIRONMENT.'/'.$file, $file)
+			: array($file);
+
 		foreach ($this->_config_paths as $path)
 		{
-			$check_locations = defined('ENVIRONMENT')
-				? array(ENVIRONMENT.'/'.$file, $file)
-				: array($file);
-
 			foreach ($check_locations as $location)
 			{
 				$file_path = $path.'config/'.$location.'.php';
@@ -172,7 +172,7 @@
 			{
 				return FALSE;
 			}
-			show_error('The configuration file '.$file.'.php'.' does not exist.');
+			show_error('The configuration file '.$file.'.php does not exist.');
 		}
 
 		return TRUE;
@@ -271,7 +271,7 @@
 	 */
 	public function base_url($uri = '')
 	{
-		return $this->slash_item('base_url').ltrim($this->_uri_string($uri),'/');
+		return $this->slash_item('base_url').ltrim($this->_uri_string($uri), '/');
 	}
 
 	// -------------------------------------------------------------
diff --git a/system/core/Input.php b/system/core/Input.php
index 162e40c..657fce6 100644
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -330,10 +330,37 @@
 
 		if (config_item('proxy_ips') != '' && $this->server('HTTP_X_FORWARDED_FOR') && $this->server('REMOTE_ADDR'))
 		{
+			$has_ranges = strpos($proxies, '/') !== FALSE;
 			$proxies = preg_split('/[\s,]/', config_item('proxy_ips'), -1, PREG_SPLIT_NO_EMPTY);
 			$proxies = is_array($proxies) ? $proxies : array($proxies);
 
-			$this->ip_address = in_array($_SERVER['REMOTE_ADDR'], $proxies) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR'];
+			if ($has_ranges)
+			{
+				$long_ip = ip2long($_SERVER['REMOTE_ADDR']);
+				$bit_32 = 1 << 32;
+
+				// Go through each of the IP Addresses to check for and
+				// test against range notation
+				foreach ($proxies as $ip)
+				{
+					list($address, $mask_length) = explode('/', $ip, 2);
+
+					// Generate the bitmask for a 32 bit IP Address
+					$bitmask = $bit_32 - (1 << (32 - (int) $mask_length));
+					if (($long_ip & $bitmask) === $address)
+					{
+						$this->ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
+						break;
+					}
+				}
+
+			}
+			else
+			{
+				$this->ip_address = in_array($_SERVER['REMOTE_ADDR'], $proxies)
+					? $_SERVER['HTTP_X_FORWARDED_FOR']
+					: $_SERVER['REMOTE_ADDR'];
+			}
 		}
 		elseif ( ! $this->server('HTTP_CLIENT_IP') && $this->server('REMOTE_ADDR'))
 		{
@@ -360,7 +387,7 @@
 		if (strpos($this->ip_address, ',') !== FALSE)
 		{
 			$x = explode(',', $this->ip_address);
-			$this->ip_address = trim(end($x));
+			$this->ip_address = trim($x[0]);
 		}
 
 		if ( ! $this->valid_ip($this->ip_address))
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 94739c7..75e9360 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -237,9 +237,9 @@
 	{
 		if (is_array($model))
 		{
-			foreach ($model as $babe)
+			foreach ($model as $class)
 			{
-				$this->model($babe);
+				$this->model($class);
 			}
 			return;
 		}
@@ -409,8 +409,8 @@
 	 * 1. The name of the "view" file to be included.
 	 * 2. An associative array of data to be extracted for use in the view.
 	 * 3. TRUE/FALSE - whether to return the data or load it. In
-	 *    some cases it's advantageous to be able to return data so that
-	 *    a developer can process it in some way.
+	 *	some cases it's advantageous to be able to return data so that
+	 *	a developer can process it in some way.
 	 *
 	 * @param	string
 	 * @param	array
@@ -633,13 +633,7 @@
 			{
 				$this->driver($driver);
 			}
-			return FALSE;
-		}
-
-		if ( ! class_exists('CI_Driver_Library'))
-		{
-			// we aren't instantiating an object here, that'll be done by the Library itself
-			require BASEPATH.'libraries/Driver.php';
+			return;
 		}
 
 		if ($library === '')
@@ -785,11 +779,11 @@
 			$_ci_ext = pathinfo($_ci_view, PATHINFO_EXTENSION);
 			$_ci_file = ($_ci_ext === '') ? $_ci_view.'.php' : $_ci_view;
 
-			foreach ($this->_ci_view_paths as $view_file => $cascade)
+			foreach ($this->_ci_view_paths as $_ci_view_file => $cascade)
 			{
-				if (file_exists($view_file.$_ci_file))
+				if (file_exists($_ci_view_file.$_ci_file))
 				{
-					$_ci_path = $view_file.$_ci_file;
+					$_ci_path = $_ci_view_file.$_ci_file;
 					$file_exists = TRUE;
 					break;
 				}
@@ -820,7 +814,7 @@
 		/*
 		 * Extract and cache variables
 		 *
-		 * You can either set variables using the dedicated $this->load_vars()
+		 * You can either set variables using the dedicated $this->load->vars()
 		 * function or via the second parameter of this function. We'll merge
 		 * the two types and cache them so that views that are embedded within
 		 * other views can have access to these variables.
@@ -837,10 +831,10 @@
 		 * We buffer the output for two reasons:
 		 * 1. Speed. You get a significant speed boost.
 		 * 2. So that the final rendered template can be post-processed by
-		 *    the output class. Why do we need post processing? For one thing,
-		 *    in order to show the elapsed page load time. Unless we can
-		 *    intercept the content right before it's sent to the browser and
-		 *    then stop the timer it won't be accurate.
+		 *	the output class. Why do we need post processing? For one thing,
+		 *	in order to show the elapsed page load time. Unless we can
+		 *	intercept the content right before it's sent to the browser and
+		 *	then stop the timer it won't be accurate.
 		 */
 		ob_start();
 
@@ -915,6 +909,13 @@
 
 			// Get the filename from the path
 			$class = substr($class, $last_slash);
+
+			// Check for match and driver base class
+			if (strtolower(trim($subdir, '/')) == strtolower($class) && ! class_exists('CI_Driver_Library'))
+			{
+				// We aren't instantiating an object here, just making the base class available
+				require BASEPATH.'libraries/Driver.php';
+			}
 		}
 
 		// We'll test for both lowercase and capitalized versions of the file name
@@ -996,14 +997,19 @@
 				$this->_ci_loaded_files[] = $filepath;
 				return $this->_ci_init_class($class, '', $params, $object_name);
 			}
-
 		} // END FOREACH
 
 		// One last attempt. Maybe the library is in a subdirectory, but it wasn't specified?
 		if ($subdir === '')
 		{
 			$path = strtolower($class).'/'.$class;
-			return $this->_ci_load_class($path, $params);
+			return $this->_ci_load_class($path, $params, $object_name);
+		}
+		else if (ucfirst($subdir) != $subdir)
+		{
+			// Lowercase subdir failed - retry capitalized
+			$path = ucfirst($subdir).$class;
+			return $this->_ci_load_class($path, $params, $object_name);
 		}
 
 		// If we got this far we were unable to find the requested class.
@@ -1091,7 +1097,7 @@
 		if ( ! class_exists($name))
 		{
 			log_message('error', 'Non-existent class: '.$name);
-			show_error('Non-existent class: '.$class);
+			show_error('Non-existent class: '.$name);
 		}
 
 		// Set the variable name we will assign the class to
@@ -1193,6 +1199,15 @@
 			}
 		}
 
+		// Autoload drivers
+		if (isset($autoload['drivers']))
+		{
+			foreach ($autoload['drivers'] as $item)
+			{
+				$this->driver($item);
+			}
+		}
+
 		// Autoload models
 		if (isset($autoload['model']))
 		{
diff --git a/system/core/Output.php b/system/core/Output.php
index 5ec8c4b..052367e 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -552,13 +552,13 @@
 		fclose($fp);
 
 		// Strip out the embedded timestamp
-		if ( ! preg_match('/(\d+TS--->)/', $cache, $match))
+		if ( ! preg_match('/^(\d+)TS--->/', $cache, $match))
 		{
 			return FALSE;
 		}
 
 		$last_modified = filemtime($cache_path);
-		$expire = trim(str_replace('TS--->', '', $match[1]));
+		$expire = $match[1];
 
 		// Has the file expired?
 		if ($_SERVER['REQUEST_TIME'] >= $expire && is_really_writable($cache_path))
@@ -575,7 +575,7 @@
 		}
 
 		// Display the cache
-		$this->_display(str_replace($match[0], '', $cache));
+		$this->_display(substr($cache, strlen($match[0])));
 		log_message('debug', 'Cache file is current. Sending it to browser.');
 		return TRUE;
 	}
diff --git a/system/core/Security.php b/system/core/Security.php
index 4593a10..b22d2cf 100644
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -395,20 +395,20 @@
 
 			if (preg_match('/<a/i', $str))
 			{
-				$str = preg_replace_callback('#<a\s+([^>]*?)(>|$)#si', array($this, '_js_link_removal'), $str);
+				$str = preg_replace_callback('#<a\s+([^>]*?)(?:>|$)#si', array($this, '_js_link_removal'), $str);
 			}
 
 			if (preg_match('/<img/i', $str))
 			{
-				$str = preg_replace_callback('#<img\s+([^>]*?)(\s?/?>|$)#si', array($this, '_js_img_removal'), $str);
+				$str = preg_replace_callback('#<img\s+([^>]*?)(?:\s?/?>|$)#si', array($this, '_js_img_removal'), $str);
 			}
 
-			if (preg_match('/(script|xss)/i', $str))
+			if (preg_match('/script|xss/i', $str))
 			{
-				$str = preg_replace('#<(/*)(script|xss)(.*?)\>#si', '[removed]', $str);
+				$str = preg_replace('#</*(?:script|xss).*?>#si', '[removed]', $str);
 			}
 		}
-		while($original !== $str);
+		while ($original !== $str);
 
 		unset($original);
 
@@ -561,6 +561,19 @@
 	// ----------------------------------------------------------------
 
 	/**
+	 * Strip Image Tags
+	 *
+	 * @param	string
+	 * @return	string
+	 */
+	public function strip_image_tags($str)
+	{
+		return preg_replace(array('#<img\s+.*?src\s*=\s*["\'](.+?)["\'].*?\>#', '#<img\s+.*?src\s*=\s*(.+?).*?\>#'), '\\1', $str);
+	}
+
+	// ----------------------------------------------------------------
+
+	/**
 	 * Compact Exploded Words
 	 *
 	 * Callback function for xss_clean() to remove whitespace from
@@ -670,7 +683,7 @@
 	protected function _js_link_removal($match)
 	{
 		return str_replace($match[1],
-					preg_replace('#href=.*?(alert\(|alert&\#40;|javascript\:|livescript\:|mocha\:|charset\=|window\.|document\.|\.cookie|<script|<xss|data\s*:)#si',
+					preg_replace('#href=.*?(?:alert\(|alert&\#40;|javascript:|livescript:|mocha:|charset=|window\.|document\.|\.cookie|<script|<xss|data\s*:)#si',
 							'',
 							$this->_filter_attributes(str_replace(array('<', '>'), '', $match[1]))
 					),
@@ -693,7 +706,7 @@
 	protected function _js_img_removal($match)
 	{
 		return str_replace($match[1],
-					preg_replace('#src=.*?(alert\(|alert&\#40;|javascript\:|livescript\:|mocha\:|charset\=|window\.|document\.|\.cookie|<script|<xss|base64\s*,)#si',
+					preg_replace('#src=.*?(?:alert\(|alert&\#40;|javascript:|livescript:|mocha:|charset=|window\.|document\.|\.cookie|<script|<xss|base64\s*,)#si',
 							'',
 							$this->_filter_attributes(str_replace(array('<', '>'), '', $match[1]))
 					),
diff --git a/system/database/DB.php b/system/database/DB.php
index 00d14b4..d751325 100644
--- a/system/database/DB.php
+++ b/system/database/DB.php
@@ -29,8 +29,8 @@
  * Initialize the database
  *
  * @category	Database
- * @author		EllisLab Dev Team
- * @link		http://codeigniter.com/user_guide/database/
+ * @author	EllisLab Dev Team
+ * @link	http://codeigniter.com/user_guide/database/
  * @param 	string
  * @param 	bool	Determines if query builder should be used or not
  */
@@ -47,6 +47,21 @@
 		}
 
 		include($file_path);
+		//make packages contain database config files
+		foreach(get_instance()->load->get_package_paths() as $path)
+		{
+			if ($path !== APPPATH)
+			{
+				if (file_exists ($file_path = $path.'config/'.ENVIRONMENT.'/database.php'))
+				{
+					include ($file_path);
+				}
+				elseif ( file_exists ($file_path = $path.'config/database.php'))
+				{
+					include ($file_path);
+				}
+			}
+		}
 
 		if ( ! isset($db) OR count($db) === 0)
 		{
@@ -144,7 +159,10 @@
 	// Load the DB driver
 	$driver_file = BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver.php';
 
-	if ( ! file_exists($driver_file)) show_error('Invalid DB driver');
+	if ( ! file_exists($driver_file))
+	{
+		show_error('Invalid DB driver');
+	}
 
 	require_once($driver_file);
 
@@ -152,6 +170,19 @@
 	$driver = 'CI_DB_'.$params['dbdriver'].'_driver';
 	$DB = new $driver($params);
 
+	// Check for a subdriver
+	if ( ! empty($DB->subdriver))
+	{
+		$driver_file = BASEPATH.'database/drivers/'.$DB->dbdriver.'/subdrivers/'.$DB->dbdriver.'_'.$DB->subdriver.'_driver.php';
+
+		if (file_exists($driver_file))
+		{
+			require_once($driver_file);
+			$driver = 'CI_DB_'.$DB->dbdriver.'_'.$DB->subdriver.'_driver';
+			$DB = new $driver($params);
+		}
+	}
+
 	if ($DB->autoinit === TRUE)
 	{
 		$DB->initialize();
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index a994441..b64b977 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -45,11 +45,13 @@
 	public $password;
 	public $hostname;
 	public $database;
-	public $dbdriver		= 'mysql';
+	public $dbdriver		= 'mysqli';
+	public $subdriver;
 	public $dbprefix		= '';
 	public $char_set		= 'utf8';
 	public $dbcollat		= 'utf8_general_ci';
 	public $autoinit		= TRUE; // Whether to automatically initialize the DB
+	public $compress		= TRUE;
 	public $swap_pre		= '';
 	public $port			= '';
 	public $pconnect		= FALSE;
@@ -77,6 +79,23 @@
 	protected $_protect_identifiers		= TRUE;
 	protected $_reserved_identifiers	= array('*'); // Identifiers that should NOT be escaped
 
+	// clause and character used for LIKE escape sequences
+	protected $_like_escape_str = " ESCAPE '%s' ";
+	protected $_like_escape_chr = '!';
+
+	/**
+	 * The syntax to count rows is slightly different across different
+	 * database engines, so this string appears in each driver and is
+	 * used for the count_all() and count_all_results() functions.
+	 */
+	protected $_count_string = 'SELECT COUNT(*) AS ';
+
+	/**
+	 * Constructor
+	 *
+	 * @param	array
+	 * @return	void
+	 */
 	public function __construct($params)
 	{
 		if (is_array($params))
@@ -295,7 +314,7 @@
 	 * @param	array	An array of binding data
 	 * @return	mixed
 	 */
-	public function query($sql, $binds = FALSE, $return_object = TRUE)
+	public function query($sql, $binds = FALSE, $return_object = NULL)
 	{
 		if ($sql === '')
 		{
@@ -303,6 +322,10 @@
 
 			return ($this->db_debug) ? $this->display_error('db_invalid_query') : FALSE;
 		}
+		elseif ( ! is_bool($return_object))
+		{
+			$return_object = ! $this->is_write_type($sql);
+		}
 
 		// Verify table prefix and replace if necessary
 		if ($this->dbprefix !== '' && $this->swap_pre !== '' && $this->dbprefix !== $this->swap_pre)
@@ -319,7 +342,7 @@
 		// Is query caching enabled? If the query is a "read type"
 		// we will load the caching class and return the previously
 		// cached query if it exists
-		if ($this->cache_on === TRUE && stripos($sql, 'SELECT') !== FALSE && $this->_cache_init())
+		if ($this->cache_on === TRUE && $return_object === TRUE && $this->_cache_init())
 		{
 			$this->load_rdriver();
 			if (FALSE !== ($cache = $this->CACHE->read($sql)))
@@ -328,7 +351,7 @@
 			}
 		}
 
-		// Save the  query for debugging
+		// Save the query for debugging
 		if ($this->save_queries === TRUE)
 		{
 			$this->queries[] = $sql;
@@ -352,7 +375,7 @@
 			$error = $this->error();
 
 			// Log errors
-			log_message('error', 'Query error: '.$error['message'] . ' - Invalid query: ' . $sql);
+			log_message('error', 'Query error: '.$error['message'].' - Invalid query: '.$sql);
 
 			if ($this->db_debug)
 			{
@@ -381,12 +404,10 @@
 		// Increment the query counter
 		$this->query_count++;
 
-		// Was the query a "write" type?
-		// If so we'll simply return true
-		if ($this->is_write_type($sql) === TRUE)
+		// Will we have a result object instantiated? If not - we'll simply return TRUE
+		if ($return_object !== TRUE)
 		{
-			// If caching is enabled we'll auto-cleanup any
-			// existing files related to this particular URI
+			// If caching is enabled we'll auto-cleanup any existing files related to this particular URI
 			if ($this->cache_on === TRUE && $this->cache_autodel === TRUE && $this->_cache_init())
 			{
 				$this->CACHE->delete();
@@ -396,8 +417,6 @@
 		}
 
 		// Return TRUE if we don't need to create a result object
-		// Currently only the Oracle driver uses this when stored
-		// procedures are used
 		if ($return_object !== TRUE)
 		{
 			return TRUE;
@@ -855,7 +874,7 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Fetch MySQL Field Names
+	 * Fetch Field Names
 	 *
 	 * @param	string	the table name
 	 * @return	array
@@ -957,7 +976,7 @@
 	 */
 	public function escape_identifiers($item)
 	{
-		if ($this->_escape_char === '')
+		if ($this->_escape_char === '' OR empty($item))
 		{
 			return $item;
 		}
@@ -970,6 +989,11 @@
 
 			return $item;
 		}
+		// Avoid breaking functions and literal values inside queries
+		elseif (ctype_digit($item) OR $item[0] === "'" OR ($this->_escape_char !== '"' && $item[0] === '"') OR strpos($item, '(') !== FALSE)
+		{
+			return $item;
+		}
 
 		static $preg_ec = array();
 
@@ -977,11 +1001,15 @@
 		{
 			if (is_array($this->_escape_char))
 			{
-				$preg_ec = array(preg_quote($this->_escape_char[0]), preg_quote($this->_escape_char[1]));
+				$preg_ec = array(
+						preg_quote($this->_escape_char[0]), preg_quote($this->_escape_char[1]),
+						$this->_escape_char[0], $this->_escape_char[1]
+						);
 			}
 			else
 			{
 				$preg_ec[0] = $preg_ec[1] = preg_quote($this->_escape_char);
+				$preg_ec[2] = $preg_ec[3] = $this->_escape_char;
 			}
 		}
 
@@ -989,11 +1017,11 @@
 		{
 			if (strpos($item, '.'.$id) !== FALSE)
 			{
-				return preg_replace('/'.$preg_ec[0].'?([^'.$preg_ec[1].'\.]+)'.$preg_ec[1].'?\./i', $preg_ec[0].'$1'.$preg_ec[1].'.', $item);
+				return preg_replace('/'.$preg_ec[0].'?([^'.$preg_ec[1].'\.]+)'.$preg_ec[1].'?\./i', $preg_ec[2].'$1'.$preg_ec[3].'.', $item);
 			}
 		}
 
-		return preg_replace('/'.$preg_ec[0].'?([^'.$preg_ec[1].'\.]+)'.$preg_ec[1].'?(\.)?/i', $preg_ec[0].'$1'.$preg_ec[1].'$2', $item);
+		return preg_replace('/'.$preg_ec[0].'?([^'.$preg_ec[1].'\.]+)'.$preg_ec[1].'?(\.)?/i', $preg_ec[2].'$1'.$preg_ec[3].'$2', $item);
 	}
 
 	// --------------------------------------------------------------------
@@ -1021,6 +1049,23 @@
 	// --------------------------------------------------------------------
 
 	/**
+	 * Insert statement
+	 *
+	 * Generates a platform-specific insert string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the insert keys
+	 * @param	array	the insert values
+	 * @return	string
+	 */
+	protected function _insert($table, $keys, $values)
+	{
+		return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
 	 * Generate an update string
 	 *
 	 * @param	string	the table upon which the query will be performed
@@ -1073,6 +1118,41 @@
 	// --------------------------------------------------------------------
 
 	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause
+	 * @param	array	the limit clause
+	 * @param	array	the like clause
+	 * @return	string
+	 */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
+			.$where
+			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
+			.($limit ? ' LIMIT '.$limit : '');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
 	 * Tests whether the string has an SQL operator
 	 *
 	 * @param	string
@@ -1162,7 +1242,6 @@
 		return $this->cache_on = FALSE;
 	}
 
-
 	// --------------------------------------------------------------------
 
 	/**
@@ -1278,7 +1357,7 @@
 		$trace = debug_backtrace();
 		foreach ($trace as $call)
 		{
-			if (isset($call['file']) && strpos($call['file'], BASEPATH.'database') === FALSE)
+			if (isset($call['file'], $call['class']) && strpos($call['file'], BASEPATH.'database') === FALSE && strpos($call['class'], 'Loader') !== FALSE)
 			{
 				// Found it - use a relative path for safety
 				$message[] = 'Filename: '.str_replace(array(APPPATH, BASEPATH), '', $call['file']);
diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index 3982885..479b7f2 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -350,18 +350,18 @@
 		is_bool($escape) OR $escape = $this->_protect_identifiers;
 
 		// Split multiple conditions
-		if ($escape === TRUE && preg_match_all('/\sAND\s|\sOR\s/i', $cond, $m, PREG_SET_ORDER | PREG_OFFSET_CAPTURE))
+		if ($escape === TRUE && preg_match_all('/\sAND\s|\sOR\s/i', $cond, $m, PREG_OFFSET_CAPTURE))
 		{
 			$newcond = '';
 			$m[0][] = array('', strlen($cond));
 
 			for ($i = 0, $c = count($m[0]), $s = 0;
 				$i < $c;
-				$s += $m[0][$i][1] + strlen($m[0][$i][0]), $i++)
+				$s = $m[0][$i][1] + strlen($m[0][$i][0]), $i++)
 			{
-				$temp = substr($cond, $s, $m[0][$i][1]);
+				$temp = substr($cond, $s, ($m[0][$i][1] - $s));
 
-				$newcond .= preg_match('/([\[\w\.-]+)([\W\s]+)(.+)/i', $temp, $match)
+				$newcond .= preg_match("/([\[\]\w\.'-]+)(\s*[^\"\[`'\w]+\s*)(.+)/i", $temp, $match)
 						? $this->protect_identifiers($match[1]).$match[2].$this->protect_identifiers($match[3])
 						: $temp;
 
@@ -371,7 +371,7 @@
 			$cond = ' ON '.$newcond;
 		}
 		// Split apart the condition and protect the identifiers
-		elseif ($escape === TRUE && preg_match('/([\[\w\.-]+)([\W\s]+)(.+)/i', $cond, $match))
+		elseif ($escape === TRUE && preg_match("/([\[\]\w\.'-]+)(\s*[^\"\[`'\w]+\s*)(.+)/i", $cond, $match))
 		{
 			$cond = ' ON '.$this->protect_identifiers($match[1]).$match[2].$this->protect_identifiers($match[3]);
 		}
@@ -1435,23 +1435,6 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Insert statement
-	 *
-	 * Generates a platform-specific insert string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the insert keys
-	 * @param	array	the insert values
-	 * @return	string
-	 */
-	protected function _insert($table, $keys, $values)
-	{
-		return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Validate Insert
 	 *
 	 * This method is used by both insert() and get_compiled_insert() to
@@ -1631,41 +1614,6 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Update statement
-	 *
-	 * Generates a platform-specific update string from the supplied data
-	 *
-	 * @param	string	the table name
-	 * @param	array	the update data
-	 * @param	array	the where clause
-	 * @param	array	the orderby clause
-	 * @param	array	the limit clause
-	 * @param	array	the like clause
-	 * @return	string
-	 */
-	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
-	{
-		foreach ($values as $key => $val)
-		{
-			$valstr[] = $key.' = '.$val;
-		}
-
-		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
-
-		if ( ! empty($like))
-		{
-			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
-		}
-
-		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
-			.$where
-			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
-			.($limit ? ' LIMIT '.$limit : '');
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Validate Update
 	 *
 	 * This method is used by both update() and get_compiled_update() to
diff --git a/system/database/DB_result.php b/system/database/DB_result.php
index 991f6ba..d44df6c 100644
--- a/system/database/DB_result.php
+++ b/system/database/DB_result.php
@@ -38,32 +38,74 @@
  */
 class CI_DB_result {
 
-	public $conn_id				= NULL;
-	public $result_id			= NULL;
+	public $conn_id;
+	public $result_id;
 	public $result_array			= array();
 	public $result_object			= array();
 	public $custom_result_object		= array();
 	public $current_row			= 0;
-	public $num_rows			= 0;
-	public $row_data			= NULL;
+	public $num_rows;
+	public $row_data;
 
+	/**
+	 * Constructor
+	 *
+	 * @param	object
+	 * @return	void
+	 */
 	public function __construct(&$driver_object)
 	{
 		$this->conn_id = $driver_object->conn_id;
 		$this->result_id = $driver_object->result_id;
 	}
 
+	// --------------------------------------------------------------------
+
 	/**
-	 * Query result.  Acts as a wrapper function for the following functions.
+	 * Number of rows in the result set
 	 *
-	 * @param	string	can be "object" or "array"
-	 * @return	object
+	 * @return	int
+	 */
+	public function num_rows()
+	{
+		if (is_int($this->num_rows))
+		{
+			return $this->num_rows;
+		}
+		elseif (count($this->result_array) > 0)
+		{
+			return $this->num_rows = count($this->result_array);
+		}
+		elseif (count($this->result_object) > 0)
+		{
+			return $this->num_rows = count($this->result_object);
+		}
+
+		return $this->num_rows = count($this->result_array());
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Query result. Acts as a wrapper function for the following functions.
+	 *
+	 * @param	string	'object', 'array' or a custom class name
+	 * @return	array
 	 */
 	public function result($type = 'object')
 	{
-		if ($type === 'array') return $this->result_array();
-		elseif ($type === 'object') return $this->result_object();
-		else return $this->custom_result_object($type);
+		if ($type === 'array')
+		{
+			return $this->result_array();
+		}
+		elseif ($type === 'object')
+		{
+			return $this->result_object();
+		}
+		else
+		{
+			return $this->custom_result_object($type);
+		}
 	}
 
 	// --------------------------------------------------------------------
@@ -76,33 +118,50 @@
 	 */
 	public function custom_result_object($class_name)
 	{
-		if (array_key_exists($class_name, $this->custom_result_object))
+		if (isset($this->custom_result_object[$class_name]))
 		{
 			return $this->custom_result_object[$class_name];
 		}
-
-		if ($this->result_id === FALSE OR $this->num_rows() === 0)
+		elseif ( ! $this->result_id OR $this->num_rows === 0)
 		{
 			return array();
 		}
 
-		// add the data to the object
-		$this->_data_seek(0);
-		$result_object = array();
-
-		while ($row = $this->_fetch_object())
+		// Don't fetch the result set again if we already have it
+		$_data = NULL;
+		if (($c = count($this->result_array)) > 0)
 		{
-			$object = new $class_name();
-			foreach ($row as $key => $value)
-			{
-				$object->$key = $value;
-			}
-
-			$result_object[] = $object;
+			$_data = 'result_array';
+		}
+		elseif (($c = count($this->result_object)) > 0)
+		{
+			$_data = 'result_object';
 		}
 
-		// return the array
-		return $this->custom_result_object[$class_name] = $result_object;
+		if ($_data !== NULL)
+		{
+			for ($i = 0; $i < $c; $i++)
+			{
+				$this->custom_result_object[$class_name][$i] = new $class_name();
+
+				foreach ($this->{$_data}[$i] as $key => $value)
+				{
+					$this->custom_result_object[$class_name][$i]->$key = $value;
+				}
+			}
+
+			return $this->custom_result_object[$class_name];
+		}
+
+		$this->_data_seek(0);
+		$this->custom_result_object[$class_name] = array();
+
+		while ($row = $this->_fetch_object($class_name))
+		{
+			$this->custom_result_object[$class_name][] = $row;
+		}
+
+		return $this->custom_result_object[$class_name];
 	}
 
 	// --------------------------------------------------------------------
@@ -119,14 +178,24 @@
 			return $this->result_object;
 		}
 
-		// In the event that query caching is on the result_id variable
-		// will return FALSE since there isn't a valid SQL resource so
-		// we'll simply return an empty array.
-		if ($this->result_id === FALSE OR $this->num_rows() === 0)
+		// In the event that query caching is on, the result_id variable
+		// will not be a valid resource so we'll simply return an empty
+		// array.
+		if ( ! $this->result_id OR $this->num_rows === 0)
 		{
 			return array();
 		}
 
+		if (($c = count($this->result_array)) > 0)
+		{
+			for ($i = 0; $i < $c; $i++)
+			{
+				$this->result_object[$i] = (object) $this->result_array[$i];
+			}
+
+			return $this->result_object;
+		}
+
 		$this->_data_seek(0);
 		while ($row = $this->_fetch_object())
 		{
@@ -139,7 +208,7 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Query result.  "array" version.
+	 * Query result. "array" version.
 	 *
 	 * @return	array
 	 */
@@ -150,14 +219,24 @@
 			return $this->result_array;
 		}
 
-		// In the event that query caching is on the result_id variable
-		// will return FALSE since there isn't a valid SQL resource so
-		// we'll simply return an empty array.
-		if ($this->result_id === FALSE OR $this->num_rows() === 0)
+		// In the event that query caching is on, the result_id variable
+		// will not be a valid resource so we'll simply return an empty
+		// array.
+		if ( ! $this->result_id OR $this->num_rows === 0)
 		{
 			return array();
 		}
 
+		if (($c = count($this->result_object)) > 0)
+		{
+			for ($i = 0; $i < $c; $i++)
+			{
+				$this->result_array[$i] = (array) $this->result_object[$i];
+			}
+
+			return $this->result_array;
+		}
+
 		$this->_data_seek(0);
 		while ($row = $this->_fetch_assoc())
 		{
@@ -239,18 +318,19 @@
 	 */
 	public function custom_row_object($n, $type)
 	{
-		$result = $this->custom_result_object($type);
-		if (count($result) === 0)
+		isset($this->custom_result_object[$type]) OR $this->custom_result_object($type);
+
+		if (count($this->custom_result_object[$type]) === 0)
 		{
 			return NULL;
 		}
 
-		if ($n !== $this->current_row && isset($result[$n]))
+		if ($n !== $this->current_row && isset($this->custom_result_object[$type][$n]))
 		{
 			$this->current_row = $n;
 		}
 
-		return $result[$this->current_row];
+		return $this->custom_result_object[$type][$this->current_row];
 	}
 
 	// --------------------------------------------------------------------
@@ -375,11 +455,21 @@
 	/**
 	 * Returns an unbuffered row and move pointer to next row
 	 *
+	 * @param	string	'array', 'object' or a custom class name
 	 * @return	mixed	either a result object or array
 	 */
 	public function unbuffered_row($type = 'object')
 	{
-		return ($type !== 'array') ? $this->_fetch_object() : $this->_fetch_assoc();
+		if ($type === 'array')
+		{
+			return $this->_fetch_assoc();
+		}
+		elseif ($type === 'object')
+		{
+			return $this->_fetch_object();
+		}
+
+		return $this->_fetch_object($type);
 	}
 
 	// --------------------------------------------------------------------
@@ -393,7 +483,6 @@
 	 * operational due to the unavailability of the database resource IDs with
 	 * cached results.
 	 */
-	public function num_rows() { return $this->num_rows; }
 	public function num_fields() { return 0; }
 	public function list_fields() { return array(); }
 	public function field_data() { return array(); }
diff --git a/system/database/drivers/cubrid/cubrid_driver.php b/system/database/drivers/cubrid/cubrid_driver.php
index 7496ee4..28724e0 100644
--- a/system/database/drivers/cubrid/cubrid_driver.php
+++ b/system/database/drivers/cubrid/cubrid_driver.php
@@ -45,16 +45,6 @@
 	// The character used for escaping - no need in CUBRID
 	protected $_escape_char = '`';
 
-	// clause and character used for LIKE escape sequences - not used in CUBRID
-	protected $_like_escape_str = '';
-	protected $_like_escape_chr = '';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' RAND()'; // database specific random keyword
 
 	// CUBRID-specific properties
@@ -78,6 +68,8 @@
 		}
 	}
 
+	// --------------------------------------------------------------------
+
 	/**
 	 * Non-persistent database connection
 	 *
diff --git a/system/database/drivers/cubrid/cubrid_result.php b/system/database/drivers/cubrid/cubrid_result.php
index 3eb9f7e..4a06a2d 100644
--- a/system/database/drivers/cubrid/cubrid_result.php
+++ b/system/database/drivers/cubrid/cubrid_result.php
@@ -33,6 +33,7 @@
  * @category	Database
  * @author		Esen Sagynov
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	2.1
  */
 class CI_DB_cubrid_result extends CI_DB_result {
 
@@ -43,7 +44,9 @@
 	 */
 	public function num_rows()
 	{
-		return @cubrid_num_rows($this->result_id);
+		return is_int($this->num_rows)
+			? $this->num_rows
+			: $this->num_rows = @cubrid_num_rows($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -157,11 +160,12 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		return cubrid_fetch_object($this->result_id);
+		return cubrid_fetch_object($this->result_id, $class_name);
 	}
 
 }
diff --git a/system/database/drivers/interbase/interbase_driver.php b/system/database/drivers/ibase/ibase_driver.php
similarity index 93%
rename from system/database/drivers/interbase/interbase_driver.php
rename to system/database/drivers/ibase/ibase_driver.php
index 38d3096..f7811bf 100644
--- a/system/database/drivers/interbase/interbase_driver.php
+++ b/system/database/drivers/ibase/ibase_driver.php
@@ -38,24 +38,14 @@
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
  */
-class CI_DB_interbase_driver extends CI_DB {
+class CI_DB_ibase_driver extends CI_DB {
 
-	public $dbdriver = 'interbase';
+	public $dbdriver = 'ibase';
 
 	// The character used to escape with
 	protected $_escape_char = '"';
 
-	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str = " ESCAPE '%s' ";
-	protected $_like_escape_chr = '!';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string	= 'SELECT COUNT(*) AS ';
-	protected $_random_keyword	= ' Random()'; // database specific random keyword
+	protected $_random_keyword = ' Random()'; // database specific random keyword
 
 	// Keeps track of the resource for the current transaction
 	protected $trans;
@@ -443,5 +433,5 @@
 
 }
 
-/* End of file interbase_driver.php */
-/* Location: ./system/database/drivers/interbase/interbase_driver.php */
\ No newline at end of file
+/* End of file ibase_driver.php */
+/* Location: ./system/database/drivers/ibase/ibase_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/interbase/interbase_forge.php b/system/database/drivers/ibase/ibase_forge.php
similarity index 96%
rename from system/database/drivers/interbase/interbase_forge.php
rename to system/database/drivers/ibase/ibase_forge.php
index d1b006e..da75eb9 100644
--- a/system/database/drivers/interbase/interbase_forge.php
+++ b/system/database/drivers/ibase/ibase_forge.php
@@ -32,7 +32,7 @@
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
  */
-class CI_DB_interbase_forge extends CI_DB_forge {
+class CI_DB_ibase_forge extends CI_DB_forge {
 
 	protected $_drop_table	= 'DROP TABLE %s';
 
@@ -190,5 +190,5 @@
 
 }
 
-/* End of file interbase_forge.php */
-/* Location: ./system/database/drivers/interbase/interbase_forge.php */
\ No newline at end of file
+/* End of file ibase_forge.php */
+/* Location: ./system/database/drivers/ibase/ibase_forge.php */
\ No newline at end of file
diff --git a/system/database/drivers/ibase/ibase_result.php b/system/database/drivers/ibase/ibase_result.php
new file mode 100644
index 0000000..95e5571
--- /dev/null
+++ b/system/database/drivers/ibase/ibase_result.php
@@ -0,0 +1,155 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+/**
+ * Interbase/Firebird Result Class
+ *
+ * This class extends the parent result class: CI_DB_result
+ *
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ * @since	3.0
+ */
+class CI_DB_ibase_result extends CI_DB_result {
+
+	/**
+	 * Number of fields in the result set
+	 *
+	 * @return	int
+	 */
+	public function num_fields()
+	{
+		return @ibase_num_fields($this->result_id);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Fetch Field Names
+	 *
+	 * Generates an array of column names
+	 *
+	 * @return	array
+	 */
+	public function list_fields()
+	{
+		$field_names = array();
+		for ($i = 0, $num_fields = $this->num_fields(); $i < $num_fields; $i++)
+		{
+			$info = ibase_field_info($this->result_id, $i);
+			$field_names[] = $info['name'];
+		}
+
+		return $field_names;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data
+	 *
+	 * Generates an array of objects containing field meta-data
+	 *
+	 * @return	array
+	 */
+	public function field_data()
+	{
+		$retval = array();
+		for ($i = 0, $c = $this->num_fields(); $i < $c; $i++)
+		{
+			$info = ibase_field_info($this->result_id, $i);
+
+			$retval[$i]			= new stdClass();
+			$retval[$i]->name		= $info['name'];
+			$retval[$i]->type		= $info['type'];
+			$retval[$i]->max_length		= $info['length'];
+			$retval[$i]->primary_key	= 0;
+			$retval[$i]->default		= '';
+		}
+
+		return $retval;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Free the result
+	 *
+	 * @return	void
+	 */
+	public function free_result()
+	{
+		@ibase_free_result($this->result_id);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Result - associative array
+	 *
+	 * Returns the result set as an array
+	 *
+	 * @return	array
+	 */
+	protected function _fetch_assoc()
+	{
+		return @ibase_fetch_assoc($this->result_id, IBASE_FETCH_BLOBS);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Result - object
+	 *
+	 * Returns the result set as an object
+	 *
+	 * @param	string
+	 * @return	object
+	 */
+	protected function _fetch_object($class_name = 'stdClass')
+	{
+		$row = @ibase_fetch_object($this->result_id, IBASE_FETCH_BLOBS);
+
+		if ($class_name === 'stdClass' OR ! $row)
+		{
+			return $row;
+		}
+
+		$class_name = new $class_name();
+		foreach ($row as $key => $value)
+		{
+			$class_name->$key = $value;
+		}
+
+		return $class_name;
+	}
+
+}
+
+/* End of file ibase_result.php */
+/* Location: ./system/database/drivers/ibase/ibase_result.php */
\ No newline at end of file
diff --git a/system/database/drivers/interbase/interbase_utility.php b/system/database/drivers/ibase/ibase_utility.php
similarity index 90%
rename from system/database/drivers/interbase/interbase_utility.php
rename to system/database/drivers/ibase/ibase_utility.php
index 1642118..d0e84a7 100644
--- a/system/database/drivers/interbase/interbase_utility.php
+++ b/system/database/drivers/ibase/ibase_utility.php
@@ -32,7 +32,7 @@
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
  */
-class CI_DB_interbase_utility extends CI_DB_utility {
+class CI_DB_ibase_utility extends CI_DB_utility {
 
 	protected $_list_databases	= FALSE;
 
@@ -58,5 +58,5 @@
 
 }
 
-/* End of file interbase_utility.php */
-/* Location: ./system/database/drivers/interbase/interbase_utility.php */
\ No newline at end of file
+/* End of file ibase_utility.php */
+/* Location: ./system/database/drivers/ibase/ibase_utility.php */
\ No newline at end of file
diff --git a/system/database/drivers/interbase/index.html b/system/database/drivers/ibase/index.html
similarity index 100%
rename from system/database/drivers/interbase/index.html
rename to system/database/drivers/ibase/index.html
diff --git a/system/database/drivers/interbase/interbase_result.php b/system/database/drivers/interbase/interbase_result.php
deleted file mode 100644
index 5ddb6fa..0000000
--- a/system/database/drivers/interbase/interbase_result.php
+++ /dev/null
@@ -1,260 +0,0 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-/**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.2.4 or newer
- *
- * NOTICE OF LICENSE
- *
- * Licensed under the Open Software License version 3.0
- *
- * This source file is subject to the Open Software License (OSL 3.0) that is
- * bundled with this package in the files license.txt / license.rst.  It is
- * also available through the world wide web at this URL:
- * http://opensource.org/licenses/OSL-3.0
- * If you did not receive a copy of the license and are unable to obtain it
- * through the world wide web, please send an email to
- * licensing@ellislab.com so we can send you a copy immediately.
- *
- * @package		CodeIgniter
- * @author		EllisLab Dev Team
- * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
- * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
- * @link		http://codeigniter.com
- * @since		Version 3.0
- * @filesource
- */
-
-/**
- * Interbase/Firebird Result Class
- *
- * This class extends the parent result class: CI_DB_result
- *
- * @category	Database
- * @author		EllisLab Dev Team
- * @link		http://codeigniter.com/user_guide/database/
- */
-class CI_DB_interbase_result extends CI_DB_result {
-
-	public $num_rows;
-
-	/**
-	 * Number of rows in the result set
-	 *
-	 * @return	int
-	 */
-	public function num_rows()
-	{
-		if (is_int($this->num_rows))
-		{
-			return $this->num_rows;
-		}
-
-		// Get the results so that you can get an accurate rowcount
-		$this->result();
-
-		return $this->num_rows;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Number of fields in the result set
-	 *
-	 * @return	int
-	 */
-	public function num_fields()
-	{
-		return @ibase_num_fields($this->result_id);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Fetch Field Names
-	 *
-	 * Generates an array of column names
-	 *
-	 * @return	array
-	 */
-	public function list_fields()
-	{
-		$field_names = array();
-		for ($i = 0, $num_fields = $this->num_fields(); $i < $num_fields; $i++)
-		{
-			$info = ibase_field_info($this->result_id, $i);
-			$field_names[] = $info['name'];
-		}
-
-		return $field_names;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Field data
-	 *
-	 * Generates an array of objects containing field meta-data
-	 *
-	 * @return	array
-	 */
-	public function field_data()
-	{
-		$retval = array();
-		for ($i = 0, $c = $this->num_fields(); $i < $c; $i++)
-		{
-			$info = ibase_field_info($this->result_id, $i);
-
-			$retval[$i]			= new stdClass();
-			$retval[$i]->name		= $info['name'];
-			$retval[$i]->type		= $info['type'];
-			$retval[$i]->max_length		= $info['length'];
-			$retval[$i]->primary_key	= 0;
-			$retval[$i]->default		= '';
-		}
-
-		return $retval;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Free the result
-	 *
-	 * @return	void
-	 */
-	public function free_result()
-	{
-		@ibase_free_result($this->result_id);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Result - associative array
-	 *
-	 * Returns the result set as an array
-	 *
-	 * @return	array
-	 */
-	protected function _fetch_assoc()
-	{
-		if (($row = @ibase_fetch_assoc($this->result_id, IBASE_FETCH_BLOBS)) !== FALSE)
-		{
-			//Increment row count
-			$this->num_rows++;
-		}
-
-		return $row;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Result - object
-	 *
-	 * Returns the result set as an object
-	 *
-	 * @return	object
-	 */
-	protected function _fetch_object()
-	{
-		if (($row = @ibase_fetch_object($this->result_id, IBASE_FETCH_BLOBS)) !== FALSE)
-		{
-			//Increment row count
-			$this->num_rows++;
-		}
-
-		return $row;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result.  "object" version.
-	 *
-	 * @return	object
-	 */
-	public function result_object()
-	{
-		if (count($this->result_object) === $this->num_rows)
-		{
-			return $this->result_object;
-		}
-
-		// Convert result array to object so that
-		// We don't have to get the result again
-		if (($c = count($this->result_array)) > 0)
-		{
-			for ($i = 0; $i < $c; $i++)
-			{
-				$this->result_object[$i] = (object) $this->result_array[$i];
-			}
-
-			return $this->result_object;
-		}
-
-		// In the event that query caching is on the result_id variable
-		// will return FALSE since there isn't a valid SQL resource so
-		// we'll simply return an empty array.
-		if ($this->result_id === FALSE)
-		{
-			return array();
-		}
-
-		$this->num_rows = 0;
-		while ($row = $this->_fetch_object())
-		{
-			$this->result_object[] = $row;
-		}
-
-		return $this->result_object;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result.  "array" version.
-	 *
-	 * @return	array
-	 */
-	public function result_array()
-	{
-		if (count($this->result_array) === $this->num_rows)
-		{
-			return $this->result_array;
-		}
-
-		// Since the object and array are really similar, just case
-		// the result object to an array  if need be
-		if (($c = count($this->result_object)) > 0)
-		{
-			for ($i = 0; $i < $c; $i++)
-			{
-				$this->result_array[$i] = (array) $this->result_object[$i];
-			}
-
-			return $this->result_array;
-		}
-
-		// In the event that query caching is on the result_id variable
-		// will return FALSE since there isn't a valid SQL resource so
-		// we'll simply return an empty array.
-		if ($this->result_id === FALSE)
-		{
-			return array();
-		}
-
-		$this->num_rows = 0;
-		while ($row = $this->_fetch_assoc())
-		{
-			$this->result_array[] = $row;
-		}
-
-		return $this->result_array;
-	}
-
-}
-
-/* End of file interbase_result.php */
-/* Location: ./system/database/drivers/interbase/interbase_result.php */
\ No newline at end of file
diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php
index 7634be2..b4a1af7 100644
--- a/system/database/drivers/mssql/mssql_driver.php
+++ b/system/database/drivers/mssql/mssql_driver.php
@@ -45,16 +45,6 @@
 	// The character used for escaping
 	protected $_escape_char = '"';
 
-	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str = " ESCAPE '%s' ";
-	protected $_like_escape_chr = '!';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() methods.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' NEWID()';
 
 	// MSSQL-specific properties
@@ -83,11 +73,27 @@
 	/**
 	 * Non-persistent database connection
 	 *
+	 * @param	bool
 	 * @return	resource
 	 */
-	public function db_connect()
+	public function db_connect($persistent = FALSE)
 	{
-		return $this->_mssql_connect();
+		$this->conn_id = ($persistent)
+				? @mssql_pconnect($this->hostname, $this->username, $this->password)
+				: @mssql_connect($this->hostname, $this->username, $this->password);
+
+		if ( ! $this->conn_id)
+		{
+			return FALSE;
+		}
+
+		// Determine how identifiers are escaped
+		$query = $this->query('SELECT CASE WHEN (@@OPTIONS | 256) = @@OPTIONS THEN 1 ELSE 0 END AS qi');
+		$query = $query->row_array();
+		$this->_quoted_identifier = empty($query) ? FALSE : (bool) $query['qi'];
+		$this->_escape_char = ($this->_quoted_identifier) ? '"' : array('[', ']');
+
+		return $this->conn_id;
 	}
 
 	// --------------------------------------------------------------------
@@ -99,35 +105,7 @@
 	 */
 	public function db_pconnect()
 	{
-		return $this->_mssql_connect(TRUE);
-	}
-
-	// --------------------------------------------------------------------
-
-	/*
-	 * MSSQL Connect
-	 *
-	 * @param	bool
-	 * @return	resource
-	 */
-	protected function _mssql_connect($persistent = FALSE)
-	{
-		$conn_id = ($persistent)
-				? @mssql_pconnect($this->hostname, $this->username, $this->password)
-				: @mssql_connect($this->hostname, $this->username, $this->password);
-
-		if ( ! $conn_id)
-		{
-			return FALSE;
-		}
-
-		// Determine how identifiers are escaped
-		$query = $this->query('SELECT CASE WHEN (@@OPTIONS | 256) = @@OPTIONS THEN 1 ELSE 0 END AS qi');
-		$query = $query->row_array();
-		$this->_quoted_identifier = empty($query) ? FALSE : (bool) $query['qi'];
-		$this->_escape_char = ($this->_quoted_identifier) ? '"' : array('[', ']');
-
-		return $conn_id;
+		return $this->db_connect(TRUE);
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/mssql/mssql_result.php b/system/database/drivers/mssql/mssql_result.php
index 5929306..aeede3f 100644
--- a/system/database/drivers/mssql/mssql_result.php
+++ b/system/database/drivers/mssql/mssql_result.php
@@ -26,13 +26,14 @@
  */
 
 /**
- * MS SQL Result Class
+ * MSSQL Result Class
  *
  * This class extends the parent result class: CI_DB_result
  *
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	1.3
  */
 class CI_DB_mssql_result extends CI_DB_result {
 
@@ -43,7 +44,9 @@
 	 */
 	public function num_rows()
 	{
-		return @mssql_num_rows($this->result_id);
+		return is_int($this->num_rows)
+			? $this->num_rows
+			: $this->num_rows = @mssql_num_rows($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -158,11 +161,25 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		return mssql_fetch_object($this->result_id);
+		$row = @mssql_fetch_object($this->result_id);
+
+		if ($class_name === 'stdClass' OR ! $row)
+		{
+			return $row;
+		}
+
+		$class_name = new $class_name();
+		foreach ($row as $key => $value)
+		{
+			$class_name->$key = $value;
+		}
+
+		return $class_name;
 	}
 
 }
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index d11f015..6b4d84d 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -45,16 +45,6 @@
 	// The character used for escaping
 	protected $_escape_char = '`';
 
-	// clause and character used for LIKE escape sequences - not used in MySQL
-	protected $_like_escape_str = '';
-	protected $_like_escape_chr = '\\';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' RAND()'; // database specific random keyword
 
 	/**
@@ -89,7 +79,14 @@
 	 */
 	public function db_connect()
 	{
-		return @mysql_connect($this->hostname, $this->username, $this->password, TRUE);
+		if ($this->compress === TRUE)
+		{
+			return @mysql_connect($this->hostname, $this->username, $this->password, TRUE, MYSQL_CLIENT_COMPRESS);
+		}
+		else
+		{
+			return @mysql_connect($this->hostname, $this->username, $this->password, TRUE);
+		}
 	}
 
 	// --------------------------------------------------------------------
@@ -101,7 +98,14 @@
 	 */
 	public function db_pconnect()
 	{
-		return @mysql_pconnect($this->hostname, $this->username, $this->password);
+		if ($this->compress === TRUE)
+		{
+			return @mysql_pconnect($this->hostname, $this->username, $this->password, MYSQL_CLIENT_COMPRESS);
+		}
+		else
+		{
+			return @mysql_pconnect($this->hostname, $this->username, $this->password);
+		}
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/mysql/mysql_result.php b/system/database/drivers/mysql/mysql_result.php
index 14d6d07..7fbb654 100644
--- a/system/database/drivers/mysql/mysql_result.php
+++ b/system/database/drivers/mysql/mysql_result.php
@@ -33,17 +33,35 @@
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	1.0
  */
 class CI_DB_mysql_result extends CI_DB_result {
 
 	/**
+	 * Constructor
+	 *
+	 * @param	object
+	 * @return	void
+	 */
+	public function __construct(&$driver_object)
+	{
+		parent::__construct($driver_object);
+
+		// Required, due to mysql_data_seek() causing nightmares
+		// with empty result sets
+		$this->num_rows = @mysql_num_rows($this->result_id);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
 	 * Number of rows in the result set
 	 *
 	 * @return	int
 	 */
 	public function num_rows()
 	{
-		return @mysql_num_rows($this->result_id);
+		return $this->num_rows;
 	}
 
 	// --------------------------------------------------------------------
@@ -132,7 +150,9 @@
 	 */
 	protected function _data_seek($n = 0)
 	{
-		return mysql_data_seek($this->result_id, $n);
+		return $this->num_rows
+			? @mysql_data_seek($this->result_id, $n)
+			: FALSE;
 	}
 
 	// --------------------------------------------------------------------
@@ -156,11 +176,12 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		return mysql_fetch_object($this->result_id);
+		return mysql_fetch_object($this->result_id, $class_name);
 	}
 
 }
diff --git a/system/database/drivers/mysqli/mysqli_driver.php b/system/database/drivers/mysqli/mysqli_driver.php
index d1581bf..453ddcc 100644
--- a/system/database/drivers/mysqli/mysqli_driver.php
+++ b/system/database/drivers/mysqli/mysqli_driver.php
@@ -45,16 +45,6 @@
 	// The character used for escaping
 	protected $_escape_char = '`';
 
-	// clause and character used for LIKE escape sequences - not used in MySQL
-	protected $_like_escape_str = '';
-	protected $_like_escape_chr = '\\';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' RAND()'; // database specific random keyword
 
 	/**
@@ -71,6 +61,17 @@
 	 */
 	public function db_connect()
 	{
+		// Use MySQL client compression?
+		if ($this->compress === TRUE)
+		{
+			$port = empty($this->port) ? NULL : $this->port;
+
+			$mysqli = mysqli_init();
+			$mysqli->real_connect($this->hostname, $this->username, $this->password, $this->database, $port, NULL, MYSQLI_CLIENT_COMPRESS);
+
+			return $mysqli;
+		}
+
 		return empty($this->port)
 			? @new mysqli($this->hostname, $this->username, $this->password, $this->database)
 			: @new mysqli($this->hostname, $this->username, $this->password, $this->database, $this->port);
@@ -91,6 +92,17 @@
 			return $this->db_connect();
 		}
 
+		// Use MySQL client compression?
+		if ($this->compress === TRUE)
+		{
+			$port = empty($this->port) ? NULL : $this->port;
+
+			$mysqli = mysqli_init();
+			$mysqli->real_connect('p:'.$this->hostname, $this->username, $this->password, $this->database, $port, NULL, MYSQLI_CLIENT_COMPRESS);
+
+			return $mysqli;
+		}
+
 		return empty($this->port)
 			? @new mysqli('p:'.$this->hostname, $this->username, $this->password, $this->database)
 			: @new mysqli('p:'.$this->hostname, $this->username, $this->password, $this->database, $this->port);
diff --git a/system/database/drivers/mysqli/mysqli_result.php b/system/database/drivers/mysqli/mysqli_result.php
index 9b4d494..c1ec4da 100644
--- a/system/database/drivers/mysqli/mysqli_result.php
+++ b/system/database/drivers/mysqli/mysqli_result.php
@@ -33,6 +33,7 @@
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	1.3
  */
 class CI_DB_mysqli_result extends CI_DB_result {
 
@@ -43,7 +44,9 @@
 	 */
 	public function num_rows()
 	{
-		return $this->result_id->num_rows;
+		return is_int($this->num_rows)
+			? $this->num_rows
+			: $this->num_rows = $this->result_id->num_rows;
 	}
 
 	// --------------------------------------------------------------------
@@ -157,11 +160,12 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		return $this->result_id->fetch_object();
+		return $this->result_id->fetch_object($class_name);
 	}
 
 }
diff --git a/system/database/drivers/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index 67bb040..7bf1894 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_driver.php
@@ -54,10 +54,6 @@
 	// The character used for excaping
 	protected $_escape_char = '"';
 
-	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str = " ESCAPE '%s' ";
-	protected $_like_escape_chr = '!';
-
 	/**
 	 * The syntax to count rows is slightly different across different
 	 * database engines, so this string appears in each driver and is
@@ -158,6 +154,8 @@
 		$this->dsn = '';
 	}
 
+	// --------------------------------------------------------------------
+
 	/**
 	 * Non-persistent database connection
 	 *
@@ -179,9 +177,9 @@
 	 */
 	public function db_pconnect()
 	{
-		return ( ! empty($this->char_set))
-			? @oci_pconnect($this->username, $this->password, $this->dsn, $this->char_set)
-			: @oci_pconnect($this->username, $this->password, $this->dsn);
+		return empty($this->char_set)
+			? @oci_pconnect($this->username, $this->password, $this->dsn)
+			: @oci_pconnect($this->username, $this->password, $this->dsn, $this->char_set);
 	}
 
 	// --------------------------------------------------------------------
@@ -217,6 +215,8 @@
 		return @oci_execute($this->stmt_id, $this->commit_mode);
 	}
 
+	// --------------------------------------------------------------------
+
 	/**
 	 * Generate a statement ID
 	 *
@@ -236,7 +236,7 @@
 	/**
 	 * Get cursor. Returns a cursor from the database
 	 *
-	 * @return	cursor id
+	 * @return	resource
 	 */
 	public function get_cursor()
 	{
@@ -300,6 +300,7 @@
 	/**
 	 * Bind parameters
 	 *
+	 * @param	array
 	 * @return	void
 	 */
 	protected function _bind_params($params)
@@ -328,6 +329,7 @@
 	/**
 	 * Begin Transaction
 	 *
+	 * @param	bool
 	 * @return	bool
 	 */
 	public function trans_begin($test_mode = FALSE)
@@ -636,8 +638,8 @@
 	protected function _limit($sql, $limit, $offset)
 	{
 		$this->limit_used = TRUE;
-		return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($offset + $limit).')'
-			.($offset ? ' WHERE rnum >= '.$offset : '');
+		return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($offset + $limit + 1).')'
+			.($offset ? ' WHERE rnum >= '.($offset + 1): '');
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/oci8/oci8_result.php b/system/database/drivers/oci8/oci8_result.php
index 6fb6c81..a2b600e 100644
--- a/system/database/drivers/oci8/oci8_result.php
+++ b/system/database/drivers/oci8/oci8_result.php
@@ -33,6 +33,7 @@
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	1.4.1
  */
 class CI_DB_oci8_result extends CI_DB_result {
 
@@ -41,14 +42,16 @@
 	public $limit_used;
 	public $commit_mode;
 
-	/* Overwriting the parent here, so we have a way to know if it's
-	 * already called or not:
+	/**
+	 * Constructor
+	 *
+	 * @param	object
+	 * @return	void
 	 */
-	public $num_rows;
-
 	public function __construct(&$driver_object)
 	{
 		parent::__construct($driver_object);
+
 		$this->stmt_id = $driver_object->stmt_id;
 		$this->curs_id = $driver_object->curs_id;
 		$this->limit_used = $driver_object->limit_used;
@@ -56,33 +59,6 @@
 		$driver_object->stmt_id = FALSE;
 	}
 
-	/**
-	 * Number of rows in the result set.
-	 *
-	 * Oracle doesn't have a graceful way to return the number of rows
-	 * so we have to use what amounts to a hack.
-	 *
-	 * @return	int
-	 */
-	public function num_rows()
-	{
-		if ( ! is_int($this->num_rows))
-		{
-			if (count($this->result_array) > 0)
-			{
-				return $this->num_rows = count($this->result_array);
-			}
-			elseif (count($this->result_object) > 0)
-			{
-				return $this->num_rows = count($this->result_object);
-			}
-
-			return $this->num_rows = count($this->result_array());
-		}
-
-		return $this->num_rows;
-	}
-
 	// --------------------------------------------------------------------
 
 	/**
@@ -191,450 +167,27 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		$id = ($this->curs_id) ? $this->curs_id : $this->stmt_id;
-		return oci_fetch_object($id);
-	}
+		$row = ($this->curs_id)
+			? oci_fetch_object($this->curs_id)
+			: oci_fetch_object($this->stmt_id);
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result. Array version.
-	 *
-	 * @return	array
-	 */
-	public function result_array()
-	{
-		if (count($this->result_array) > 0)
+		if ($class_name === 'stdClass' OR ! $row)
 		{
-			return $this->result_array;
-		}
-		elseif (count($this->result_object) > 0)
-		{
-			for ($i = 0, $c = count($this->result_object); $i < $c; $i++)
-			{
-				$this->result_array[$i] = (array) $this->result_object[$i];
-			}
-
-			return $this->result_array;
-		}
-		elseif (is_array($this->row_data))
-		{
-			if (count($this->row_data) === 0)
-			{
-				return $this->result_array;
-			}
-			else
-			{
-				$row_index = count($this->row_data);
-			}
-		}
-		else
-		{
-			$row_index = 0;
-			$this->row_data = array();
+			return $row;
 		}
 
-		$row = NULL;
-		while ($row = $this->_fetch_assoc())
-		{
-			$this->row_data[$row_index++] = $row;
-		}
-
-		return $this->result_array = $this->row_data;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result. "object" version.
-	 *
-	 * @return	array
-	 */
-	public function result_object()
-	{
-		if (count($this->result_object) > 0)
-		{
-			return $this->result_object;
-		}
-		elseif (count($this->result_array) > 0)
-		{
-			for ($i = 0, $c = count($this->result_array); $i < $c; $i++)
-			{
-				$this->result_object[] = (object) $this->result_array[$i];
-			}
-
-			return $this->result_object;
-		}
-		elseif (is_array($this->row_data))
-		{
-			if (count($this->row_data) === 0)
-			{
-				return $this->result_object;
-			}
-			else
-			{
-				$row_index = count($this->row_data);
-				for ($i = 0; $i < $row_index; $i++)
-				{
-					$this->result_object[$i] = (object) $this->row_data[$i];
-				}
-			}
-		}
-		else
-		{
-			$row_index = 0;
-			$this->row_data = array();
-		}
-
-		$row = NULL;
-		while ($row = $this->_fetch_object())
-		{
-			$this->row_data[$row_index] = (array) $row;
-			$this->result_object[$row_index++] = $row;
-		}
-
-		return $this->result_object;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result. Custom object version.
-	 *
-	 * @param	string	class name used to instantiate rows to
-	 * @return	array
-	 */
-	public function custom_result_object($class_name)
-	{
-		if (isset($this->custom_result_object[$class_name]))
-		{
-			return $this->custom_result_object[$class_name];
-		}
-
-		if ( ! class_exists($class_name) OR $this->result_id === FALSE OR $this->num_rows() === 0)
-		{
-			return array();
-		}
-
-		/* Even if we didn't have result_array or result_object
-		 * set prior to custom_result_object() being called,
-		 * num_rows() has already done so.
-		 * Pass by reference, as we don't know how
-		 * large it might be and we don't want 1000 row
-		 * sets being copied.
-		 */
-		if (count($this->result_array) > 0)
-		{
-			$data = &$this->result_array;
-		}
-		elseif (count($this->result_object) > 0)
-		{
-			$data = &$this->result_object;
-		}
-
-		$this->custom_result_object[$class_name] = array();
-		for ($i = 0, $c = count($data); $i < $c; $i++)
-		{
-			$this->custom_result_object[$class_name][$i] = new $class_name();
-			foreach ($data[$i] as $key => $value)
-			{
-				$this->custom_result_object[$class_name][$i]->$key = $value;
-			}
-		}
-
-		return $this->custom_result_object[$class_name];
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Single row result.
-	 *
-	 * Acts as a wrapper for row_object(), row_array()
-	 * and custom_row_object(). Also used by first_row(), next_row()
-	 * and previous_row().
-	 *
-	 * @param	int	row index
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function row($n = 0, $type = 'object')
-	{
-		if ($type === 'object')
-		{
-			return $this->row_object($n);
-		}
-		elseif ($type === 'array')
-		{
-			return $this->row_array($n);
-		}
-
-		return $this->custom_row_object($n, $type);
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Single row result. Array version.
-	 *
-	 * @param	int	row index
-	 * @return	array
-	 */
-	public function row_array($n = 0)
-	{
-		// Make sure $n is not a string
-		if ( ! is_int($n))
-		{
-			$n = (int) $n;
-		}
-
-		/* If row_data is initialized, it means that we've already tried
-		 * (at least) to fetch some data, so ... check if we already have
-		 * this row.
-		*/
-		if (is_array($this->row_data))
-		{
-			/* If we already have row_data[$n] - return it.
-			 *
-			 * If we enter the elseif, there's a number of reasons to
-			 * return an empty array:
-			 *
-			 *	- count($this->row_data) === 0 means there are no results
-			 *	- num_rows being set, result_array and/or result_object
-			 *	  having count() > 0 means that we've already fetched all
-			 *	  data and $n is greater than our highest row index available
-			 *	- $n < $this->current_row means that if such row existed,
-			 *	  we would've already returned it, therefore $n is an
-			 *	  invalid index
-			 */
-			if (isset($this->row_data[$n])) // We already have this row
-			{
-				$this->current_row = $n;
-				return $this->row_data[$n];
-			}
-			elseif (count($this->row_data) === 0 OR is_int($this->num_rows)
-				OR count($this->result_array) > 0 OR count($this->result_object) > 0
-				OR $n < $this->current_row)
-			{
-				// No such row exists
-				return NULL;
-			}
-
-			// Get the next row index that would actually need to be fetched
-			$current_row = ($this->current_row < count($this->row_data)) ? count($this->row_data) : $this->current_row + 1;
-		}
-		else
-		{
-			$current_row = $this->current_row = 0;
-			$this->row_data = array();
-		}
-
-		/* Fetch more data, if available
-		 *
-		 * NOTE: Operator precedence is important here, if you change
-		 *	 'AND' with '&&' - it WILL BREAK the results, as
-		 *	 $row will be assigned the scalar value of both
-		 *	 expressions!
-		 */
-		while ($row = $this->_fetch_assoc() AND $current_row <= $n)
-		{
-			$this->row_data[$current_row++] = $row;
-		}
-
-		// This would mean that there's no (more) data to fetch
-		if ( ! is_array($this->row_data) OR ! isset($this->row_data[$n]))
-		{
-			// Cache what we already have
-			if (is_array($this->row_data))
-			{
-				$this->num_rows = count($this->row_data);
-				/* Usually, row_data could have less elements than result_array,
-				 * but at this point - they should be exactly the same.
-				 */
-				$this->result_array = $this->row_data;
-			}
-			else
-			{
-				$this->num_rows = 0;
-			}
-
-			return NULL;
-		}
-
-		$this->current_row = $n;
-		return $this->row_data[$n];
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Single row result. Object version.
-	 *
-	 * @param	int	row index
-	 * @return	mixed	object if row found; empty array if not
-	 */
-	public function row_object($n = 0)
-	{
-		// Make sure $n is not a string
-		if ( ! is_int($n))
-		{
-			$n = (int) $n;
-		}
-		/* Logic here is exactly the same as in row_array,
-		 * except we have to cast row_data[$n] to an object.
-		 *
-		 * If we already have result_object though - we can
-		 * directly return from it.
-		 */
-		if (isset($this->result_object[$n]))
-		{
-			$this->current_row = $n;
-			// Set this, if not already done.
-			if ( ! is_int($this->num_rows))
-			{
-				$this->num_rows = count($this->result_object);
-			}
-
-			return $this->result_object[$n];
-		}
-
-		$row = $this->row_array($n);
-		// Cast only if the row exists
-		if (count($row) > 0)
-		{
-			$this->current_row = $n;
-			return (object) $row;
-		}
-
-		return NULL;
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Single row result. Custom object version.
-	 *
-	 * @param	int	row index
-	 * @param	string	custom class name
-	 * @return	mixed	custom object if row found; empty array otherwise
-	 */
-	public function custom_row_object($n = 0, $class_name)
-	{
-		// Make sure $n is not a string
-		if ( ! is_int($n))
-		{
-			$n = (int) $n;
-		}
-
-		if (array_key_exists($class_name, $this->custom_result_object))
-		{
-			/* We already have a the whole result set with this class_name,
-			 * return the specified row if it exists, and an empty array if
-			 * it doesn't.
-			 */
-			if (isset($this->custom_result_object[$class_name][$n]))
-			{
-				$this->current_row = $n;
-				return $this->custom_result_object[$class_name][$n];
-			}
-			else
-			{
-				return NULL;
-			}
-		}
-		elseif ( ! class_exists($class_name)) // No such class exists
-		{
-			return NULL;
-		}
-
-		$row = $this->row_array($n);
-		// A non-array would mean that the row doesn't exist
-		if ( ! is_array($row))
-		{
-			return NULL;
-		}
-
-		// Convert to the desired class and return
-		$row_object = new $class_name();
+		$class_name = new $class_name();
 		foreach ($row as $key => $value)
 		{
-			$row_object->$key = $value;
+			$class_name->$key = $value;
 		}
 
-		$this->current_row = $n;
-		return $row_object;
-	}
-
-	// --------------------------------------------------------------------
-
-	/* First row result.
-	 *
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function first_row($type = 'object')
-	{
-		return $this->row(0, $type);
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Last row result.
-	 *
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function last_row($type = 'object')
-	{
-		$result = &$this->result($type);
-		if ( ! isset($this->num_rows))
-		{
-			$this->num_rows = count($result);
-		}
-		$this->current_row = $this->num_rows - 1;
-		return $result[$this->current_row];
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Next row result.
-	 *
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function next_row($type = 'object')
-	{
-		if (is_array($this->row_data))
-		{
-			$count = count($this->row_data);
-			if ($this->current_row > $count OR ($this->current_row === 0 && $count === 0))
-			{
-				$n = $count;
-			}
-			else
-			{
-				$n = $this->current_row + 1;
-			}
-		}
-		else
-		{
-			$n = 0;
-		}
-
-		return $this->row($n, $type);
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Previous row result.
-	 *
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function previous_row($type = 'object')
-	{
-		$n = ($this->current_row !== 0) ? $this->current_row - 1 : 0;
-		return $this->row($n, $type);
+		return $class_name;
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/odbc/odbc_driver.php b/system/database/drivers/odbc/odbc_driver.php
index bd57592..fbf6a4c 100644
--- a/system/database/drivers/odbc/odbc_driver.php
+++ b/system/database/drivers/odbc/odbc_driver.php
@@ -45,16 +45,8 @@
 	// the character used to excape - not necessary for ODBC
 	protected $_escape_char = '';
 
-	// clause and character used for LIKE escape sequences
 	protected $_like_escape_str = " {escape '%s'} ";
-	protected $_like_escape_chr = '!';
 
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword;
 
 	public function __construct($params)
diff --git a/system/database/drivers/odbc/odbc_forge.php b/system/database/drivers/odbc/odbc_forge.php
index b074c58..d17b046 100644
--- a/system/database/drivers/odbc/odbc_forge.php
+++ b/system/database/drivers/odbc/odbc_forge.php
@@ -34,7 +34,6 @@
  */
 class CI_DB_odbc_forge extends CI_DB_forge {
 
-	protected $_drop_database	= 'DROP DATABASE %s';
 	protected $_drop_table		= 'DROP TABLE %s';
 
 	/**
diff --git a/system/database/drivers/odbc/odbc_result.php b/system/database/drivers/odbc/odbc_result.php
index 227fe4f..48dc48d 100644
--- a/system/database/drivers/odbc/odbc_result.php
+++ b/system/database/drivers/odbc/odbc_result.php
@@ -33,11 +33,10 @@
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	1.3
  */
 class CI_DB_odbc_result extends CI_DB_result {
 
-	public $num_rows;
-
 	/**
 	 * Number of rows in the result set
 	 *
@@ -49,16 +48,26 @@
 		{
 			return $this->num_rows;
 		}
-
-		// Work-around for ODBC subdrivers that don't support num_rows()
-		if (($this->num_rows = @odbc_num_rows($this->result_id)) === -1)
+		elseif (($this->num_rows = @odbc_num_rows($this->result_id)) !== -1)
 		{
-			$this->num_rows = count($this->result_array());
+			return $this->num_rows;
 		}
 
-		return $this->num_rows;
+		// Work-around for ODBC subdrivers that don't support num_rows()
+		if (count($this->result_array) > 0)
+		{
+			return $this->num_rows = count($this->result_array);
+		}
+		elseif (count($this->result_object) > 0)
+		{
+			return $this->num_rows = count($this->result_object);
+		}
+
+		return $this->num_rows = count($this->result_array());
 	}
 
+	// --------------------------------------------------------------------
+
 	/**
 	 * Number of fields in the result set
 	 *
@@ -146,9 +155,7 @@
 	 */
 	protected function _fetch_assoc()
 	{
-		return function_exists('odbc_fetch_array')
-			? odbc_fetch_array($this->result_id)
-			: $this->_odbc_fetch_array($this->result_id);
+		return odbc_fetch_array($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -158,57 +165,47 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		return function_exists('odbc_fetch_object')
-			? odbc_fetch_object($this->result_id)
-			: $this->_odbc_fetch_object($this->result_id);
-	}
+		$row = odbc_fetch_object($this->result_id);
 
-	// --------------------------------------------------------------------
-
-	/**
-	 * Result - object
-	 *
-	 * subsititutes the odbc_fetch_object function when
-	 * not available (odbc_fetch_object requires unixODBC)
-	 *
-	 * @return	object
-	 */
-	protected function _odbc_fetch_object(& $odbc_result)
-	{
-		$rs = array();
-		if ( ! odbc_fetch_into($odbc_result, $rs))
+		if ($class_name === 'stdClass' OR ! $row)
 		{
-			return FALSE;
+			return $row;
 		}
 
-		$rs_obj = new stdClass();
-		foreach ($rs as $k => $v)
+		$class_name = new $class_name();
+		foreach ($row as $key => $value)
 		{
-			$field_name = odbc_field_name($odbc_result, $k+1);
-			$rs_obj->$field_name = $v;
+			$class_name->$key = $value;
 		}
 
-		return $rs_obj;
+		return $class_name;
 	}
 
-	// --------------------------------------------------------------------
+}
 
+// --------------------------------------------------------------------
+
+if ( ! function_exists('odbc_fetch_array'))
+{
 	/**
-	 * Result - array
+	 * ODBC Fetch array
 	 *
-	 * subsititutes the odbc_fetch_array function when
-	 * not available (odbc_fetch_array requires unixODBC)
+	 * Emulates the native odbc_fetch_array() function when
+	 * it is not available (odbc_fetch_array() requires unixODBC)
 	 *
+	 * @param	resource
+	 * @param	int
 	 * @return	array
 	 */
-	protected function _odbc_fetch_array(& $odbc_result)
+	function odbc_fetch_array(& $result, $rownumber = 1)
 	{
 		$rs = array();
-		if ( ! odbc_fetch_into($odbc_result, $rs))
+		if ( ! odbc_fetch_into($result, $rs, $rownumber))
 		{
 			return FALSE;
 		}
@@ -216,83 +213,45 @@
 		$rs_assoc = array();
 		foreach ($rs as $k => $v)
 		{
-			$field_name = odbc_field_name($odbc_result, $k+1);
+			$field_name = odbc_field_name($result, $k+1);
 			$rs_assoc[$field_name] = $v;
 		}
 
 		return $rs_assoc;
 	}
+}
 
-	// --------------------------------------------------------------------
+// --------------------------------------------------------------------
 
+if ( ! function_exists('odbc_fetch_object'))
+{
 	/**
-	 * Query result. Array version.
+	 * ODBC Fetch object
 	 *
-	 * @return	array
-	 */
-	public function result_array()
-	{
-		if (count($this->result_array) > 0)
-		{
-			return $this->result_array;
-		}
-		elseif (($c = count($this->result_object)) > 0)
-		{
-			for ($i = 0; $i < $c; $i++)
-			{
-				$this->result_array[$i] = (array) $this->result_object[$i];
-			}
-		}
-		elseif ($this->result_id === FALSE)
-		{
-			return array();
-		}
-		else
-		{
-			while ($row = $this->_fetch_assoc())
-			{
-				$this->result_array[] = $row;
-			}
-		}
-
-		return $this->result_array;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result. Object version.
+	 * Emulates the native odbc_fetch_object() function when
+	 * it is not available.
 	 *
-	 * @return	array
+	 * @param	resource
+	 * @param	int
+	 * @return	object
 	 */
-	public function result_object()
+	function odbc_fetch_object(& $result, $rownumber = 1)
 	{
-		if (count($this->result_object) > 0)
+		$rs = array();
+		if ( ! odbc_fetch_into($result, $rs, $rownumber))
 		{
-			return $this->result_object;
-		}
-		elseif (($c = count($this->result_array)) > 0)
-		{
-			for ($i = 0; $i < $c; $i++)
-			{
-				$this->result_object[$i] = (object) $this->result_array[$i];
-			}
-		}
-		elseif ($this->result_id === FALSE)
-		{
-			return array();
-		}
-		else
-		{
-			while ($row = $this->_fetch_object())
-			{
-				$this->result_object[] = $row;
-			}
+			return FALSE;
 		}
 
-		return $this->result_object;
+		$rs_object = new stdClass();
+		foreach ($rs as $k => $v)
+		{
+			$field_name = odbc_field_name($result, $k+1);
+			$rs_object->$field_name = $v;
+		}
+
+		return $rs_object;
 	}
-
 }
 
 /* End of file odbc_result.php */
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index a3ad469..0ffe3bc 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -42,25 +42,24 @@
 
 	public $dbdriver = 'pdo';
 
-	// the character used to excape - not necessary for PDO
-	protected $_escape_char = '';
+	// The character used to escaping
+	protected $_escape_char = '"';
 
-	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str = " ESCAPE '%s' ";
-	protected $_like_escape_chr = '!';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword;
 
-	// need to track the pdo driver and options
-	public $pdodriver;
+	public $trans_enabled = FALSE;
+
+	// need to track the PDO options
 	public $options = array();
 
+	/**
+	 * Constructor
+	 *
+	 * Validates the DSN string and/or detects the subdriver
+	 *
+	 * @param	array
+	 * @return	void
+	 */
 	public function __construct($params)
 	{
 		parent::__construct($params);
@@ -69,118 +68,36 @@
 		{
 			// If there is a minimum valid dsn string pattern found, we're done
 			// This is for general PDO users, who tend to have a full DSN string.
-			$this->pdodriver = end($match);
+			$this->subdriver = $match[1];
+			return;
 		}
-		else
+		// Legacy support for DSN specified in the hostname field
+		elseif (preg_match('/([^;]+):/', $this->hostname, $match) && count($match) === 2)
 		{
-			// Try to build a complete DSN string from params
-			$this->_connect_string($params);
+			$this->dsn = $this->hostname;
+			$this->hostname = NULL;
+			$this->subdriver = $match[1];
+			return;
 		}
+		elseif (in_array($this->subdriver, array('mssql', 'sybase'), TRUE))
+		{
+			$this->subdriver = 'dblib';
+		}
+		elseif ($this->subdriver === '4D')
+		{
+			$this->subdriver = '4d';
+		}
+		elseif ( ! in_array($this->subdriver, array('4d', 'cubrid', 'dblib', 'firebird', 'ibm', 'informix', 'mysql', 'oci', 'odbc', 'sqlite', 'sqlsrv'), TRUE))
+		{
+			log_message('error', 'PDO: Invalid or non-existent subdriver');
 
-		// clause and character used for LIKE escape sequences
-		// this one depends on the driver being used
-		if ($this->pdodriver === 'mysql')
-		{
-			$this->_escape_char = '`';
-			$this->_like_escape_str = '';
-			$this->_like_escape_chr = '\\';
-		}
-		elseif ($this->pdodriver === 'odbc')
-		{
-			$this->_like_escape_str = " {escape '%s'} ";
-		}
-		elseif ( ! in_array($this->pdodriver, array('sqlsrv', 'mssql', 'dblib', 'sybase')))
-		{
-			$this->_escape_char = '"';
-		}
-
-		$this->trans_enabled = FALSE;
-		$this->_random_keyword = ' RND('.time().')'; // database specific random keyword
-	}
-
-	/**
-	 * Connection String
-	 *
-	 * @param	array
-	 * @return	void
-	 */
-	protected function _connect_string($params)
-	{
-		if (strpos($this->hostname, ':'))
-		{
-			// hostname generally would have this prototype
-			// $db['hostname'] = 'pdodriver:host(/Server(/DSN))=hostname(/DSN);';
-			// We need to get the prefix (pdodriver used by PDO).
-			$dsnarray = explode(':', $this->hostname);
-			$this->pdodriver = $dsnarray[0];
-
-			// End dsn with a semicolon for extra backward compability
-			// if database property was not empty.
-			if ( ! empty($this->database))
+			if ($this->db_debug)
 			{
-				$this->dsn .= rtrim($this->hostname, ';').';';
-			}
-		}
-		else
-		{
-			// Invalid DSN, display an error
-			if ( ! array_key_exists('pdodriver', $params))
-			{
-				show_error('Invalid DB Connection String for PDO');
-			}
-
-			// Assuming that the following DSN string format is used:
-			// $dsn = 'pdo://username:password@hostname:port/database?pdodriver=pgsql';
-			$this->dsn = $this->pdodriver.':';
-
-			// Add hostname to the DSN for databases that need it
-			if ( ! empty($this->hostname)
-				&& strpos($this->hostname, ':') === FALSE
-				&& in_array($this->pdodriver, array('informix', 'mysql', 'pgsql', 'sybase', 'mssql', 'dblib', 'cubrid')))
-			{
-			    $this->dsn .= 'host='.$this->hostname.';';
-			}
-
-			// Add a port to the DSN for databases that can use it
-			if ( ! empty($this->port) && in_array($this->pdodriver, array('informix', 'mysql', 'pgsql', 'ibm', 'cubrid')))
-			{
-			    $this->dsn .= 'port='.$this->port.';';
+				show_error('Invalid or non-existent PDO subdriver');
 			}
 		}
 
-		// Add the database name to the DSN, if needed
-	    if (stripos($this->dsn, 'dbname') === FALSE
-	       && in_array($this->pdodriver, array('4D', 'pgsql', 'mysql', 'firebird', 'sybase', 'mssql', 'dblib', 'cubrid')))
-	    {
-	        $this->dsn .= 'dbname='.$this->database.';';
-	    }
-	    elseif (stripos($this->dsn, 'database') === FALSE && in_array($this->pdodriver, array('ibm', 'sqlsrv')))
-	    {
-	    	if (stripos($this->dsn, 'dsn') === FALSE)
-	    	{
-		        $this->dsn .= 'database='.$this->database.';';
-	    	}
-	    }
-	    elseif ($this->pdodriver === 'sqlite' && $this->dsn === 'sqlite:')
-	    {
-	        if ($this->database !== ':memory')
-	        {
-	            if ( ! file_exists($this->database))
-	            {
-	                show_error('Invalid DB Connection string for PDO SQLite');
-	            }
-
-	            $this->dsn .= (strpos($this->database, DIRECTORY_SEPARATOR) !== 0) ? DIRECTORY_SEPARATOR : '';
-	        }
-
-	        $this->dsn .= $this->database;
-	    }
-
-	    // Add charset to the DSN, if needed
-	    if ( ! empty($this->char_set) && in_array($this->pdodriver, array('4D', 'mysql', 'sybase', 'mssql', 'dblib', 'oci')))
-	    {
-	        $this->dsn .= 'charset='.$this->char_set.';';
-	    }
+		$this->dsn = NULL;
 	}
 
 	// --------------------------------------------------------------------
@@ -188,53 +105,17 @@
 	/**
 	 * Non-persistent database connection
 	 *
-	 * @return	object
-	 */
-	public function db_connect()
-	{
-		return $this->_pdo_connect();
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Persistent database connection
-	 *
-	 * @return	object
-	 */
-	public function db_pconnect()
-	{
-		return $this->_pdo_connect(TRUE);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * PDO connection
-	 *
 	 * @param	bool
 	 * @return	object
 	 */
-	protected function _pdo_connect($persistent = FALSE)
+	public function db_connect($persistent = FALSE)
 	{
-		$this->options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT;
-		$persistent === FALSE OR $this->options[PDO::ATTR_PERSISTENT] = TRUE;
-
-		/* Prior to PHP 5.3.6, even if the charset was supplied in the DSN
-		 * on connect - it was ignored. This is a work-around for the issue.
-		 *
-		 * Reference: http://www.php.net/manual/en/ref.pdo-mysql.connection.php
-		 */
-		if ($this->pdodriver === 'mysql' && ! is_php('5.3.6') && ! empty($this->char_set))
-		{
-			$this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$this->char_set
-					.( ! empty($this->db_collat) ? " COLLATE '".$this->dbcollat."'" : '');
-		}
+		$this->options[PDO::ATTR_PERSISTENT] = $persistent;
 
 		// Connecting...
 		try
 		{
-			return new PDO($this->dsn, $this->username, $this->password, $this->options);
+			return @new PDO($this->dsn, $this->username, $this->password, $this->options);
 		}
 		catch (PDOException $e)
 		{
@@ -250,15 +131,38 @@
 	// --------------------------------------------------------------------
 
 	/**
+	 * Persistent database connection
+	 *
+	 * @return	object
+	 */
+	public function db_pconnect()
+	{
+		return $this->db_connect(TRUE);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
 	 * Database version number
 	 *
 	 * @return	string
 	 */
 	public function version()
 	{
-		return isset($this->data_cache['version'])
-			? $this->data_cache['version']
-			: $this->data_cache['version'] = $this->conn_id->getAttribute(PDO::ATTR_SERVER_VERSION);
+		if (isset($this->data_cache['version']))
+		{
+			return $this->data_cache['version'];
+		}
+
+		// Not all subdrivers support the getAttribute() method
+		try
+		{
+			return $this->data_cache['version'] = $this->conn_id->getAttribute(PDO::ATTR_SERVER_VERSION);
+		}
+		catch (PDOException $e)
+		{
+			return parent::version();
+		}
 	}
 
 	// --------------------------------------------------------------------
@@ -358,7 +262,7 @@
 		$str = $this->conn_id->quote($str);
 
 		// If there are duplicated quotes, trim them away
-		if (strpos($str, "'") === 0)
+		if ($str[0] === "'")
 		{
 			$str = substr($str, 1, -1);
 		}
@@ -396,69 +300,12 @@
 	 */
 	public function insert_id($name = NULL)
 	{
-		if ($this->pdodriver === 'pgsql' && $name === NULL && $this->version() >= '8.1')
-		{
-			$query = $this->query('SELECT LASTVAL() AS ins_id');
-			$query = $query->row();
-			return $query->ins_id;
-		}
-
 		return $this->conn_id->lastInsertId($name);
 	}
 
 	// --------------------------------------------------------------------
 
 	/**
-	 * Show table query
-	 *
-	 * Generates a platform-specific query string so that the table names can be fetched
-	 *
-	 * @param	bool
-	 * @return	string
-	 */
-	protected function _list_tables($prefix_limit = FALSE)
-	{
-		if ($this->pdodriver === 'pgsql')
-		{
-			// Analog function to show all tables in postgre
-			$sql = "SELECT * FROM information_schema.tables WHERE table_schema = 'public'";
-		}
-		elseif ($this->pdodriver === 'sqlite')
-		{
-			// Analog function to show all tables in sqlite
-			$sql = "SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%'";
-		}
-		else
-		{
-			$sql = 'SHOW TABLES FROM '.$this->escape_identifiers($this->database);
-		}
-
-		if ($prefix_limit !== FALSE AND $this->dbprefix !== '')
-		{
-			return FALSE;
-		}
-
-		return $sql;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Show column query
-	 *
-	 * Generates a platform-specific query string so that the column names can be fetched
-	 *
-	 * @param	string	the table name
-	 * @return	string
-	 */
-	protected function _list_columns($table = '')
-	{
-		return 'SHOW COLUMNS FROM '.$this->escape_identifiers($table);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Field data query
 	 *
 	 * Generates a platform-specific query so that the column data can be retrieved
@@ -468,23 +315,7 @@
 	 */
 	protected function _field_data($table)
 	{
-		if ($this->pdodriver === 'mysql' or $this->pdodriver === 'pgsql')
-		{
-			// Analog function for mysql and postgre
-			return 'SELECT * FROM '.$this->escape_identifiers($table).' LIMIT 1';
-		}
-		elseif ($this->pdodriver === 'oci')
-		{
-			// Analog function for oci
-			return 'SELECT * FROM '.$this->escape_identifiers($table).' WHERE ROWNUM <= 1';
-		}
-		elseif ($this->pdodriver === 'sqlite')
-		{
-			// Analog function for sqlite
-			return 'PRAGMA table_info('.$this->escape_identifiers($table).')';
-		}
-
-		return 'SELECT TOP 1 FROM '.$this->escape_identifiers($table);
+		return 'SELECT TOP 1 * FROM '.$this->protect_identifiers($table);
 	}
 
 	// --------------------------------------------------------------------
@@ -530,8 +361,8 @@
 	 */
 	protected function _update_batch($table, $values, $index, $where = NULL)
 	{
-		$ids   = array();
-		$where = ($where !== '' && count($where) >=1) ? implode(" ", $where).' AND ' : '';
+		$ids = array();
+		$where = ($where !== '' && count($where) >=1) ? implode(' ', $where).' AND ' : '';
 
 		foreach ($values as $key => $val)
 		{
@@ -582,32 +413,10 @@
 	 */
 	protected function _truncate($table)
 	{
-		return 'DELETE FROM '.$table;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Limit string
-	 *
-	 * Generates a platform-specific LIMIT clause
-	 *
-	 * @param	string	the sql query string
-	 * @param	int	the number of rows to limit the query to
-	 * @param	int	the offset value
-	 * @return	string
-	 */
-	protected function _limit($sql, $limit, $offset)
-	{
-		if ($this->pdodriver === 'pgsql')
-		{
-			return $sql.' LIMIT '.$limit.($offset ? ' OFFSET '.$offset : '');
-		}
-
-		return $sql.' LIMIT '.($offset ? $offset.', ' : '').$limit;
+		return 'TRUNCATE TABLE '.$table;
 	}
 
 }
 
 /* End of file pdo_driver.php */
-/* Location: ./system/database/drivers/pdo/pdo_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/pdo/pdo_driver.php */
diff --git a/system/database/drivers/pdo/pdo_forge.php b/system/database/drivers/pdo/pdo_forge.php
index 02ceb74..34a6ee4 100644
--- a/system/database/drivers/pdo/pdo_forge.php
+++ b/system/database/drivers/pdo/pdo_forge.php
@@ -34,7 +34,6 @@
  */
 class CI_DB_pdo_forge extends CI_DB_forge {
 
-	protected $_drop_database	= 'DROP DATABASE %s';
 	protected $_drop_table		= 'DROP TABLE %s';
 
 	/**
@@ -78,7 +77,7 @@
 				if ( ! empty($attributes['CONSTRAINT']))
 				{
 					// Exception for Postgre numeric which not too happy with constraint within those type
-					if ( ! ($this->db->pdodriver === 'pgsql' && in_array($attributes['TYPE'], $numeric)))
+					if ( ! ($this->db->subdriver === 'pgsql' && in_array($attributes['TYPE'], $numeric)))
 					{
 						$sql .= '('.$attributes['CONSTRAINT'].')';
 					}
diff --git a/system/database/drivers/pdo/pdo_result.php b/system/database/drivers/pdo/pdo_result.php
index 0b8937c..4444069 100644
--- a/system/database/drivers/pdo/pdo_result.php
+++ b/system/database/drivers/pdo/pdo_result.php
@@ -21,7 +21,7 @@
  * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
  * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
  * @link		http://codeigniter.com
- * @since		Version 2.1.0
+ * @since		Version 1.0
  * @filesource
  */
 
@@ -33,72 +33,35 @@
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	2.1
  */
 class CI_DB_pdo_result extends CI_DB_result {
 
 	/**
-	 * @var bool  Hold the flag whether a result handler already fetched before
-	 */
-	protected $is_fetched = FALSE;
-
-	/**
-	 * @var mixed Hold the fetched assoc array of a result handler
-	 */
-	protected $result_assoc;
-
-	/**
 	 * Number of rows in the result set
 	 *
 	 * @return	int
 	 */
 	public function num_rows()
 	{
-		if (empty($this->result_id) OR ! is_object($this->result_id))
+		if (is_int($this->num_rows))
 		{
-			// invalid result handler
-			return 0;
+			return $this->num_rows;
 		}
-		elseif (($num_rows = $this->result_id->rowCount()) && $num_rows > 0)
+		elseif (count($this->result_array) > 0)
 		{
-			// If rowCount return something, we're done.
-			return $num_rows;
+			return $this->num_rows = count($this->result_array);
+		}
+		elseif (count($this->result_object) > 0)
+		{
+			return $this->num_rows = count($this->result_object);
+		}
+		elseif (($num_rows = $this->result_id->rowCount()) > 0)
+		{
+			return $this->num_rows = $num_rows;
 		}
 
-		// Fetch the result, instead perform another extra query
-		return ($this->is_fetched && is_array($this->result_assoc)) ? count($this->result_assoc) : count($this->result_assoc());
-	}
-
-	/**
-	 * Fetch the result handler
-	 *
-	 * @return	mixed
-	 */
-	public function result_assoc()
-	{
-		// If the result already fetched before, use that one
-		if (count($this->result_array) > 0 OR $this->is_fetched)
-		{
-			return $this->result_array();
-		}
-
-		// Define the output
-		$output = array('assoc', 'object');
-
-		// Initial value
-		$this->result_assoc = array() and $this->result_object = array();
-
-		// Fetch the result
-		while ($row = $this->_fetch_assoc())
-		{
-			$this->result_assoc[] = $row;
-			$this->result_object[] = (object) $row;
-		}
-
-		// Save this as buffer and marked the fetch flag
-		$this->result_array = $this->result_assoc;
-		$this->is_fetched = TRUE;
-
-		return $this->result_assoc;
+		return $this->num_rows = count($this->result_array());
 	}
 
 	// --------------------------------------------------------------------
@@ -124,12 +87,14 @@
 	 */
 	public function list_fields()
 	{
-		if ($this->db->db_debug)
+		$field_names = array();
+		for ($i = 0, $c = $this->num_fields(); $i < $c; $i++)
 		{
-			return $this->db->display_error('db_unsuported_feature');
+			$field_names[$i] = @$this->result_id->getColumnMeta();
+			$field_names[$i] = $field_names[$i]['name'];
 		}
 
-		return FALSE;
+		return $field_names;
 	}
 
 	// --------------------------------------------------------------------
@@ -240,11 +205,12 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		return $this->result_id->fetch(PDO::FETCH_OBJ);
+		return $this->result_id->fetchObject($class_name);
 	}
 
 }
diff --git a/system/database/drivers/interbase/index.html b/system/database/drivers/pdo/subdrivers/index.html
similarity index 100%
copy from system/database/drivers/interbase/index.html
copy to system/database/drivers/pdo/subdrivers/index.html
diff --git a/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php b/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php
new file mode 100644
index 0000000..e287f5c
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php
@@ -0,0 +1,223 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO 4D Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_4d_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = '4d';
+
+	// The character used for escaping
+	protected $_escape_char = array('[', ']');
+
+	protected $_random_keyword = ' RAND()';
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = '4D:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+			empty($this->port) OR $this->dsn .= ';port='.$this->port;
+			empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+			empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+		}
+		elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 3) === FALSE)
+		{
+			$this->dsn .= ';charset='.$this->char_set;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SELECT '.$this->escape_identifiers('TABLE_NAME').' FROM '.$this->escape_identifiers('_USER_TABLES');
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			$sql .= ' WHERE '.$this->escape_identifiers('TABLE_NAME')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT '.$this->escape_identifiers('COLUMN_NAME').' FROM '.$this->escape_identifiers('_USER_COLUMNS')
+			.' WHERE '.$this->escape_identifiers('TABLE_NAME').' = '.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT * FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE).' LIMIT 1';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
+	 * @return	string
+         */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause (ignored)
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+
+		$conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
+
+		return 'DELETE FROM '.$table.$conditions;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		return $sql.' LIMIT '.$limit.($offset ? ' OFFSET '.$offset : '');
+	}
+
+}
+
+/* End of file pdo_4d_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_4d_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
new file mode 100644
index 0000000..eb37147
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
@@ -0,0 +1,185 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO CUBRID Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_cubrid_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'cubrid';
+
+	protected $_escape_char = '`';
+
+	protected $_random_keyword = ' RAND()';
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'cubrid:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+			empty($this->port) OR $this->dsn .= ';port='.$this->port;
+			empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+			empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SHOW TABLES';
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT * FROM '.$this->protect_identifiers($table).' LIMIT 1';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update_Batch statement
+	 *
+	 * Generates a platform-specific batch update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @return	string
+	 */
+	protected function _update_batch($table, $values, $index, $where = NULL)
+	{
+		$ids = array();
+		foreach ($values as $key => $val)
+		{
+			$ids[] = $val[$index];
+
+			foreach (array_keys($val) as $field)
+			{
+				if ($field !== $index)
+				{
+					$final[$field][] =  'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
+				}
+			}
+		}
+
+		$cases = '';
+		foreach ($final as $k => $v)
+		{
+			$cases .= $k." = CASE \n"
+				.implode("\n", $v)."\n"
+				.'ELSE '.$k.' END), ';
+		}
+
+		return 'UPDATE '.$table.' SET '.substr($cases, 0, -2)
+			.' WHERE '.(($where !== '' && count($where) > 0) ? implode(' ', $where).' AND ' : '')
+			.$index.' IN('.implode(',', $ids).')';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Truncate statement
+	 *
+	 * Generates a platform-specific truncate string from the supplied data
+	 *
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _truncate($table)
+	{
+		return 'TRUNCATE '.$table;
+	}
+
+}
+
+/* End of file pdo_cubrid_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
new file mode 100644
index 0000000..7060c9e
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
@@ -0,0 +1,265 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO DBLIB Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_dblib_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'dblib';
+
+	protected $_random_keyword = ' NEWID()';
+
+	protected $_quoted_identifier;
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = $params['subdriver'].':host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+			if ( ! empty($this->port))
+			{
+				$this->dsn .= (DIRECTORY_SEPARATOR === '\\' ? ',' : ':').$this->port;
+			}
+
+			empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+			empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+			empty($this->appname) OR $this->dsn .= ';appname='.$this->appname;
+		}
+		else
+		{
+			if ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 6) === FALSE)
+			{
+				$this->dsn .= ';charset='.$this->char_set;
+			}
+
+			$this->subdriver = 'dblib';
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Non-persistent database connection
+	 *
+	 * @param	bool
+	 * @return	object
+	 */
+	public function db_connect($persistent = FALSE)
+	{
+		$this->conn_id = parent::db_connect($persistent);
+
+		if ( ! is_object($this->conn_id))
+		{
+			return $this->conn_id;
+		}
+
+		// Determine how identifiers are escaped
+		$query = $this->query('SELECT CASE WHEN (@@OPTIONS | 256) = @@OPTIONS THEN 1 ELSE 0 END AS qi');
+		$query = $query->row_array();
+		$this->_quoted_identifier = empty($query) ? FALSE : (bool) $query['qi'];
+		$this->_escape_char = ($this->_quoted_identifier) ? '"' : array('[', ']');
+
+		return $this->conn_id;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		return 'SELECT '.$this->escape_identifiers('name')
+			.' FROM '.$this->escape_identifiers('sysobjects')
+			.' WHERE '.$this->escape_identifiers('type')." = 'U'";
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			$sql .= ' AND '.$this->escape_identifiers('name')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql.' ORDER BY '.$this->escape_identifiers('name');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT '.$this->escape_identifiers('column_name')
+				.' FROM '.$this->escape_identifiers('information_schema.columns')
+				.' WHERE '.$this->escape_identifiers('table_name').' = '.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
+	 * @return	string
+         */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+
+		$conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
+
+		return ($limit)
+			? 'WITH ci_delete AS (SELECT TOP '.$limit.' * FROM '.$table.$conditions.') DELETE FROM ci_delete'
+			: 'DELETE FROM '.$table.$conditions;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		$limit = $offset + $limit;
+
+		// As of SQL Server 2005 (9.0.*) ROW_NUMBER() is supported,
+		// however an ORDER BY clause is required for it to work
+		if (version_compare($this->version(), '9', '>=') && $offset && ! empty($this->qb_orderby))
+		{
+			$orderby = 'ORDER BY '.implode(', ', $this->qb_orderby);
+
+			// We have to strip the ORDER BY clause
+			$sql = trim(substr($sql, 0, strrpos($sql, 'ORDER BY '.$orderby)));
+
+			return 'SELECT '.(count($this->qb_select) === 0 ? '*' : implode(', ', $this->qb_select))." FROM (\n"
+				.preg_replace('/^(SELECT( DISTINCT)?)/i', '\\1 ROW_NUMBER() OVER('.$orderby.') AS '.$this->escape_identifiers('CI_rownum').', ', $sql)
+				."\n) ".$this->escape_identifiers('CI_subquery')
+				."\nWHERE ".$this->escape_identifiers('CI_rownum').' BETWEEN '.((int) $offset + 1).' AND '.$limit;
+		}
+
+		return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$limit.' ', $sql);
+	}
+
+}
+
+/* End of file pdo_dblib_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php */
diff --git a/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php b/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php
new file mode 100644
index 0000000..c074a9a
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php
@@ -0,0 +1,262 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO Firebird Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_firebird_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'firebird';
+
+	/**
+	 * The syntax to count rows is slightly different across different
+	 * database engines, so this string appears in each driver and is
+	 * used for the count_all() and count_all_results() functions.
+	 */
+	protected $_random_keyword = ' RANDOM()'; // Currently not supported
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'firebird:';
+
+			if ( ! empty($this->database))
+			{
+				$this->dsn .= 'dbname='.$this->database;
+			}
+			elseif ( ! empty($this->hostname))
+			{
+				$this->dsn .= 'dbname='.$this->hostname;
+			}
+
+			empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+			empty($this->role) OR $this->dsn .= ';role='.$this->role;
+		}
+		elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 9) === FALSE)
+		{
+			$this->dsn .= ';charset='.$this->char_set;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SELECT "RDB$RELATION_NAME" FROM "RDB$RELATIONS" WHERE "RDB$RELATION_NAME" NOT LIKE \'RDB$%\' AND "RDB$RELATION_NAME" NOT LIKE \'MON$%\'';
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			return $sql.' AND "RDB$RELATION_NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT "RDB$FIELD_NAME" FROM "RDB$RELATION_FIELDS" WHERE "RDB$RELATION_NAME" = '.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT FIRST 1 * FROM '.$this->protect_identifiers($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return 	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
+	 * @return	string
+	 */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
+			.$where
+			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Truncate statement
+	 *
+	 * Generates a platform-specific truncate string from the supplied data
+	 *
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
+	 *
+	 * @param	string	the table name
+	 * @return	string
+         */
+	protected function _truncate($table)
+	{
+		return 'DELETE FROM '.$table;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause (ignored)
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+
+		return 'DELETE FROM '.$table.(count($conditions) > 0 ? ' WHERE '.implode(' AND ', $conditions) : '');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		// Limit clause depends on if Interbase or Firebird
+		if (stripos($this->version(), 'firebird') !== FALSE)
+		{
+			$select = 'FIRST '. (int) $limit
+				.($offset > 0 ? ' SKIP '. (int) $offset : '');
+		}
+		else
+		{
+			$select = 'ROWS '
+				.($offset > 0 ? (int) $offset.' TO '.($limit + $offset) : (int) $limit);
+		}
+
+		return preg_replace('`SELECT`i', 'SELECT '.$select, $sql);
+	}
+
+}
+
+/* End of file pdo_firebird_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php b/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php
new file mode 100644
index 0000000..832c03c
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php
@@ -0,0 +1,262 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO IBM DB2 Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_ibm_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'ibm';
+
+	protected $_random_keyword = ' RAND()';
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'ibm:';
+
+			// Pre-defined DSN
+			if (empty($this->hostname) && empty($this->HOSTNAME) && empty($this->port) && empty($this->PORT))
+			{
+				if (isset($this->DSN))
+				{
+					$this->dsn .= 'DSN='.$this->DSN;
+				}
+				elseif ( ! empty($this->database))
+				{
+					$this->dsn .= 'DSN='.$this->database;
+				}
+
+				return;
+			}
+
+			$this->dsn .= 'DRIVER='.(isset($this->DRIVER) ? '{'.$this->DRIVER.'}' : '{IBM DB2 ODBC DRIVER}').';';
+
+			if (isset($this->DATABASE))
+			{
+				$this->dsn .= 'DATABASE='.$this->DATABASE.';';
+			}
+			elseif ( ! empty($this->database))
+			{
+				$this->dsn .= 'DATABASE='.$this->database.';';
+			}
+
+			if (isset($this->HOSTNAME))
+			{
+				$this->dsn .= 'HOSTNAME='.$this->HOSTNAME.';';
+			}
+			else
+			{
+				$this->dsn .= 'HOSTNAME='.(empty($this->hostname) ? '127.0.0.1;' : $this->hostname.';');
+			}
+
+			if (isset($this->PORT))
+			{
+				$this->dsn .= 'PORT='.$this->port.';';
+			}
+			elseif ( ! empty($this->port))
+			{
+				$this->dsn .= ';PORT='.$this->port.';';
+			}
+
+			$this->dsn .= 'PROTOCOL='.(isset($this->PROTOCOL) ? $this->PROTOCOL.';' : 'TCPIP;');
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SELECT "tabname" FROM "syscat"."tables" WHERE "type" = \'T\'';
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			$sql .= ' AND "tabname" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT "colname" FROM "syscat"."tables"
+			WHERE "syscat"."tabtype" = \'T\' AND "syscat"."tabname" = '.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT * FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE).' FETCH FIRST 1 ROWS ONLY';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
+	 * @return	string
+         */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause (ignored)
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+
+		$conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
+
+		return 'DELETE FROM '.$table.$conditions;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		$sql .= ' FETCH FIRST '.($limit + $offset).' ROWS ONLY';
+
+		return ($offset)
+			? 'SELECT * FROM ('.$sql.') WHERE rownum > '.$offset
+			: $sql;
+	}
+
+}
+
+/* End of file pdo_ibm_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php b/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php
new file mode 100644
index 0000000..a3efc63
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php
@@ -0,0 +1,271 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO Informix Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_informix_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'informix';
+
+	protected $_random_keyword = ' RAND()';
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'informix:';
+
+			// Pre-defined DSN
+			if (empty($this->hostname) && empty($this->host) && empty($this->port) && empty($this->service))
+			{
+				if (isset($this->DSN))
+				{
+					$this->dsn .= 'DSN='.$this->DSN;
+				}
+				elseif ( ! empty($this->database))
+				{
+					$this->dsn .= 'DSN='.$this->database;
+				}
+
+				return;
+			}
+
+			if (isset($this->host))
+			{
+				$this->dsn .= 'host='.$this->host;
+			}
+			else
+			{
+				$this->dsn .= 'host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+			}
+
+			if (isset($this->service))
+			{
+				$this->dsn .= '; service='.$this->service;
+			}
+			elseif ( ! empty($this->port))
+			{
+				$this->dsn .= '; service='.$this->port;
+			}
+
+			empty($this->database) OR $this->dsn .= '; database='.$this->database;
+			empty($this->server) OR $this->dsn .= '; server='.$this->server;
+
+			$this->dsn .= '; protocol='.(isset($this->protocol) ? $this->protocol : 'onsoctcp')
+				.'; EnableScrollableCursors=1';
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SELECT "tabname" FROM "systables" WHERE "tabid" > 99 AND "tabtype" = \'T\'';
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			$sql .= ' AND "tabname" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT "colname" FROM "systables", "syscolumns"
+			WHERE "systables"."tabid" = "syscolumns"."tabid" AND "systables"."tabtype" = \'T\' AND "systables"."tabname" = '
+			.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT FIRST 1 * FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
+	 * @return	string
+         */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Truncate statement
+	 *
+	 * Generates a platform-specific truncate string from the supplied data
+	 *
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _truncate($table)
+	{
+		return 'TRUNCATE TABLE ONLY '.$table;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause (ignored)
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+
+		$conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
+
+		return 'DELETE FROM '.$table.$conditions;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		$select = 'SELECT '.($offset ? 'SKIP '.$offset : '').'FIRST '.$limit.' ';
+		return preg_replace('/^(SELECT\s)/i', $select, $sql, 1);
+	}
+
+}
+
+/* End of file pdo_informix_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_informix_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
new file mode 100644
index 0000000..b680702
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
@@ -0,0 +1,213 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO MySQL Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_mysql_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'mysql';
+
+	protected $_escape_char = '`';
+
+	protected $_random_keyword = ' RAND()';
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'mysql:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+			empty($this->port) OR $this->dsn .= ';port='.$this->port;
+			empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+			empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+		}
+		elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 6) === FALSE && is_php('5.3.6'))
+		{
+			$this->dsn .= ';charset='.$this->char_set;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Non-persistent database connection
+	 *
+	 * @param	bool
+	 * @return	object
+	 */
+	public function db_connect($persistent = FALSE)
+	{
+		/* Prior to PHP 5.3.6, even if the charset was supplied in the DSN
+		 * on connect - it was ignored. This is a work-around for the issue.
+		 *
+		 * Reference: http://www.php.net/manual/en/ref.pdo-mysql.connection.php
+		 */
+		if ( ! is_php('5.3.6') && ! empty($this->char_set))
+		{
+			$this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$this->char_set
+				.(empty($this->dbcollat) ? '' : ' COLLATE '.$this->dbcollat);
+		}
+
+		return parent::db_connect($persistent);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SHOW TABLES';
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT * FROM '.$this->protect_identifiers($table).' LIMIT 1';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update_Batch statement
+	 *
+	 * Generates a platform-specific batch update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @return	string
+	 */
+	protected function _update_batch($table, $values, $index, $where = NULL)
+	{
+		$ids = array();
+		foreach ($values as $key => $val)
+		{
+			$ids[] = $val[$index];
+
+			foreach (array_keys($val) as $field)
+			{
+				if ($field !== $index)
+				{
+					$final[$field][] =  'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
+				}
+			}
+		}
+
+		$cases = '';
+		foreach ($final as $k => $v)
+		{
+			$cases .= $k." = CASE \n"
+				.implode("\n", $v)."\n"
+				.'ELSE '.$k.' END), ';
+		}
+
+		return 'UPDATE '.$table.' SET '.substr($cases, 0, -2)
+			.' WHERE '.(($where !== '' && count($where) > 0) ? implode(' ', $where).' AND ' : '')
+			.$index.' IN('.implode(',', $ids).')';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Truncate statement
+	 *
+	 * Generates a platform-specific truncate string from the supplied data
+	 *
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _truncate($table)
+	{
+		return 'TRUNCATE '.$table;
+	}
+
+}
+
+/* End of file pdo_mysql_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php b/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php
new file mode 100644
index 0000000..56ec1bc
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php
@@ -0,0 +1,230 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO Oracle Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_oci_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'oci';
+
+	/**
+	 * The syntax to count rows is slightly different across different
+	 * database engines, so this string appears in each driver and is
+	 * used for the count_all() and count_all_results() functions.
+	 */
+	protected $_count_string = 'SELECT COUNT(1) AS ';
+	protected $_random_keyword = ' ASC'; // Currently not supported
+
+	protected $_reserved_identifiers = array('*', 'rownum');
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'oci:dbname=';
+
+			// Oracle has a slightly different PDO DSN format (Easy Connect),
+			// which also supports pre-defined DSNs.
+			if (empty($this->hostname) && empty($this->port))
+			{
+				$this->dsn .= $this->database;
+			}
+			else
+			{
+				$this->dsn .= '//'.(empty($this->hostname) ? '127.0.0.1' : $this->hostname)
+					.(empty($this->port) ? '' : ':'.$this->port).'/';
+
+				empty($this->database) OR $this->dsn .= $this->database;
+			}
+
+			empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+		}
+		elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 4) === FALSE)
+		{
+			$this->dsn .= ';charset='.$this->char_set;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SELECT "TABLE_NAME" FROM "ALL_TABLES"';
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			return $sql.' WHERE "TABLE_NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT "COLUMN_NAME" FROM "all_tab_columns" WHERE "TABLE_NAME" = '.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT * FROM '.$this->protect_identifiers($table).' WHERE rownum = 1';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Insert_batch statement
+	 *
+	 * @param	string	the table name
+	 * @param	array	the insert keys
+	 * @param	array	the insert values
+	 * @return 	string
+	 */
+	protected function _insert_batch($table, $keys, $values)
+	{
+		$keys = implode(', ', $keys);
+		$sql = "INSERT ALL\n";
+
+		for ($i = 0, $c = count($values); $i < $c; $i++)
+		{
+			$sql .= '	INTO '.$table.' ('.$keys.') VALUES '.$values[$i]."\n";
+		}
+
+		return $sql.'SELECT * FROM dual';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+		empty($limit) OR $conditions[] = 'rownum <= '.$limit;
+
+		return 'DELETE FROM '.$table.(count($conditions) > 0 ? ' WHERE '.implode(' AND ', $conditions) : '');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($offset + $limit + 1).')'
+			.($offset ? ' WHERE rnum >= '.($offset + 1): '');
+	}
+
+}
+
+/* End of file pdo_oci_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_oci_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php b/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php
new file mode 100644
index 0000000..dd7a1af
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php
@@ -0,0 +1,267 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO ODBC Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_odbc_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'odbc';
+
+	// The character used for escaping - not used in ODBC
+	protected $_escape_char = '';
+
+	// clause and character used for LIKE escape sequences
+	protected $_like_escape_str = " {escape '%s'} ";
+
+	protected $_random_keyword = ' RAND()';
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'odbc:';
+
+			// Pre-defined DSN
+			if (empty($this->hostname) && empty($this->HOSTNAME) && empty($this->port) && empty($this->PORT))
+			{
+				if (isset($this->DSN))
+				{
+					$this->dsn .= 'DSN='.$this->DSN;
+				}
+				elseif ( ! empty($this->database))
+				{
+					$this->dsn .= 'DSN='.$this->database;
+				}
+
+				return;
+			}
+
+			// If the DSN is not pre-configured - try to build an IBM DB2 connection string
+			$this->dsn .= 'DRIVER='.(isset($this->DRIVER) ? '{'.$this->DRIVER.'}' : '{IBM DB2 ODBC DRIVER}').';';
+
+			if (isset($this->DATABASE))
+			{
+				$this->dsn .= 'DATABASE='.$this->DATABASE.';';
+			}
+			elseif ( ! empty($this->database))
+			{
+				$this->dsn .= 'DATABASE='.$this->database.';';
+			}
+
+			if (isset($this->HOSTNAME))
+			{
+				$this->dsn .= 'HOSTNAME='.$this->HOSTNAME.';';
+			}
+			else
+			{
+				$this->dsn .= 'HOSTNAME='.(empty($this->hostname) ? '127.0.0.1;' : $this->hostname.';');
+			}
+
+			if (isset($this->PORT))
+			{
+				$this->dsn .= 'PORT='.$this->port.';';
+			}
+			elseif ( ! empty($this->port))
+			{
+				$this->dsn .= ';PORT='.$this->port.';';
+			}
+
+			$this->dsn .= 'PROTOCOL='.(isset($this->PROTOCOL) ? $this->PROTOCOL.';' : 'TCPIP;');
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'";
+
+		if ($prefix_limit !== FALSE && $this->dbprefix !== '')
+		{
+			return $sql." AND table_name LIKE '".$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+                return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT column_name FROM information_schema.columns WHERE table_name = '.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
+	 * @return	string
+         */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Truncate statement
+	 *
+	 * Generates a platform-specific truncate string from the supplied data
+	 *
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _truncate($table)
+	{
+		return 'DELETE FROM '.$table;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+
+		$conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
+
+		return 'DELETE FROM '.$table.$conditions;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$limit.' ', $sql);
+	}
+
+}
+
+/* End of file pdo_odbc_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
new file mode 100644
index 0000000..9a476f1
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
@@ -0,0 +1,341 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO PostgreSQL Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_pgsql_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'pgsql';
+
+	protected $_random_keyword = ' RANDOM()';
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'pgsql:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+			empty($this->port) OR $this->dsn .= ';port='.$this->port;
+			empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Insert ID
+	 *
+	 * @param	string
+	 * @return	int
+	 */
+	public function insert_id($name = NULL)
+	{
+		if ($name === NULL && version_compare($this->version(), '8.1', '>='))
+		{
+			$query = $this->query('SELECT LASTVAL() AS ins_id');
+			$query = $query->row();
+			return $query->ins_id;
+		}
+
+		return $this->conn_id->lastInsertId($name);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SELECT "table_name" FROM "information_schema"."tables" WHERE "table_schema" = \'public\'';
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			return $sql.' AND "table_name" LIKE \''
+				.$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT "column_name" FROM "information_schema"."columns" WHERE "table_name" = '.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT * FROM '.$this->protect_identifiers($table).' LIMIT 1';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
+	 * @return	string
+         */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update_Batch statement
+	 *
+	 * Generates a platform-specific batch update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @return	string
+	 */
+	protected function _update_batch($table, $values, $index, $where = NULL)
+	{
+		$ids = array();
+		foreach ($values as $key => $val)
+		{
+			$ids[] = $val[$index];
+
+			foreach (array_keys($val) as $field)
+			{
+				if ($field !== $index)
+				{
+					$final[$field][] =  'WHEN '.$val[$index].' THEN '.$val[$field];
+				}
+			}
+		}
+
+		$cases = '';
+		foreach ($final as $k => $v)
+		{
+			$cases .= $k.' = (CASE '.$k."\n"
+				.implode("\n", $v)."\n"
+				.'ELSE '.$k.' END), ';
+		}
+
+		return 'UPDATE '.$table.' SET '.substr($cases, 0, -2)
+			.' WHERE '.(($where !== '' && count($where) > 0) ? implode(' ', $where).' AND ' : '')
+			.$index.' IN('.implode(',', $ids).')';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause (ignored)
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+
+		return 'DELETE FROM '.$table.(count($conditions) > 0 ? ' WHERE '.implode(' AND ', $conditions) : '');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		return $sql.' LIMIT '.$limit.($offset ? ' OFFSET '.$offset : '');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Where
+	 *
+	 * Called by where() or or_where()
+	 *
+	 * @param	mixed
+	 * @param	mixed
+	 * @param	string
+	 * @return	object
+	 */
+	protected function _where($key, $value = NULL, $type = 'AND ', $escape = NULL)
+	{
+		if ( ! is_array($key))
+		{
+			$key = array($key => $value);
+		}
+
+		// If the escape value was not set will will base it on the global setting
+		is_bool($escape) OR $escape = $this->_protect_identifiers;
+
+		foreach ($key as $k => $v)
+		{
+			$prefix = (count($this->qb_where) === 0 && count($this->qb_cache_where) === 0)
+				? $this->_group_get_type('')
+				: $this->_group_get_type($type);
+
+			$k = (($op = $this->_get_operator($k)) !== FALSE)
+				? $this->protect_identifiers(substr($k, 0, strpos($k, $op)), FALSE, $escape).strstr($k, $op)
+				: $this->protect_identifiers($k, FALSE, $escape);
+
+			if (is_null($v) && ! $this->_has_operator($k))
+			{
+				// value appears not to have been set, assign the test to IS NULL
+				$k .= ' IS NULL';
+			}
+
+			if ( ! is_null($v))
+			{
+				if ($escape === TRUE)
+				{
+					$v = ' '.$this->escape($v);
+				}
+				elseif (is_bool($v))
+				{
+					$v = ($v ? ' TRUE' : ' FALSE');
+				}
+
+				if ( ! $this->_has_operator($k))
+				{
+					$k .= ' = ';
+				}
+			}
+
+			$this->qb_where[] = $prefix.$k.$v;
+			if ($this->qb_caching === TRUE)
+			{
+				$this->qb_cache_where[] = $prefix.$k.$v;
+				$this->qb_cache_exists[] = 'where';
+			}
+
+		}
+
+		return $this;
+	}
+
+}
+
+/* End of file pdo_pgsql_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php
new file mode 100644
index 0000000..bf0363f
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php
@@ -0,0 +1,167 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO SQLite Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_sqlite_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'sqlite';
+
+	/**
+	 * The syntax to count rows is slightly different across different
+	 * database engines, so this string appears in each driver and is
+	 * used for the count_all() and count_all_results() functions.
+	 */
+	protected $_random_keyword = ' RANDOM()'; // Currently not supported
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'sqlite:';
+
+			if (empty($this->database) && empty($this->hostname))
+			{
+				$this->database = ':memory:';
+			}
+
+			$this->database = empty($this->database) ? $this->hostname : $this->database;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		$sql = 'SELECT "NAME" FROM "SQLITE_MASTER" WHERE "TYPE" = \'table\'';
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			return $sql.' AND "NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		// Not supported
+		return FALSE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT * FROM '.$this->protect_identifiers($table).' LIMIT 0,1';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Replace statement
+	 *
+	 * @param	string	the table name
+	 * @param	array	the insert keys
+	 * @param	array	the insert values
+	 * @return 	string
+	 */
+	protected function _replace($table, $keys, $values)
+	{
+		return 'INSERT OR '.parent::_replace($table, $keys, $values);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Truncate statement
+	 *
+	 * Generates a platform-specific truncate string from the supplied data
+	 *
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
+	 *
+	 * @param	string	the table name
+	 * @return	string
+         */
+	protected function _truncate($table)
+	{
+		return 'DELETE FROM '.$table;
+	}
+
+}
+
+/* End of file pdo_sqlite_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php */
\ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
new file mode 100644
index 0000000..f125b8f
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
@@ -0,0 +1,299 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 3.0.0
+ * @filesource
+ */
+
+/**
+ * PDO SQLSRV Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_sqlsrv_driver extends CI_DB_pdo_driver {
+
+	public $subdriver = 'sqlsrv';
+
+	protected $_random_keyword = ' NEWID()';
+
+	protected $_quoted_identifier;
+
+	/**
+	 * Constructor
+	 *
+	 * Builds the DSN if not already set.
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (empty($this->dsn))
+		{
+			$this->dsn = 'sqlsrv:Server='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+			empty($this->port) OR $this->dsn .= ','.$this->port;
+			empty($this->database) OR $this->dsn .= ';Database='.$this->database;
+
+			// Some custom options
+
+			if (isset($this->QuotedId))
+			{
+				$this->dsn .= ';QuotedId='.$this->QuotedId;
+				$this->_quoted_identifier = (bool) $this->QuotedId;
+			}
+
+			if (isset($this->ConnectionPooling))
+			{
+				$this->dsn .= ';ConnectionPooling='.$this->ConnectionPooling;
+			}
+
+			if (isset($this->Encrypt))
+			{
+				$this->dsn .= ';Encrypt='.$this->Encrypt;
+			}
+
+			if (isset($this->TraceOn))
+			{
+				$this->dsn .= ';TraceOn='.$this->TraceOn;
+			}
+
+			if (isset($this->TrustServerCertificate))
+			{
+				$this->dsn .= ';TrustServerCertificate='.$this->TrustServerCertificate;
+			}
+
+			empty($this->APP) OR $this->dsn .= ';APP='.$this->APP;
+			empty($this->Failover_Partner) OR $this->dsn .= ';Failover_Partner='.$this->Failover_Partner;
+			empty($this->LoginTimeout) OR $this->dsn .= ';LoginTimeout='.$this->LoginTimeout;
+			empty($this->MultipleActiveResultSets) OR $this->dsn .= ';MultipleActiveResultSets='.$this->MultipleActiveResultSets;
+			empty($this->TraceFile) OR $this->dsn .= ';TraceFile='.$this->TraceFile;
+			empty($this->WSID) OR $this->dsn .= ';WSID='.$this->WSID;
+		}
+		elseif (preg_match('/QuotedId=(0|1)/', $this->dsn, $match))
+		{
+			$this->_quoted_identifier = (bool) $match[1];
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Non-persistent database connection
+	 *
+	 * @param	bool
+	 * @return	object
+	 */
+	public function db_connect($persistent = FALSE)
+	{
+		if ( ! empty($this->char_set) && preg_match('/utf[^8]*8/i', $this->char_set))
+		{
+			$this->options[PDO::SQLSRV_ENCODING_UTF8] = 1;
+		}
+
+		$this->conn_id = parent::db_connect($persistent);
+
+		if ( ! is_object($this->conn_id) OR is_bool($this->_quoted_identifier))
+		{
+			return $this->conn_id;
+		}
+
+		// Determine how identifiers are escaped
+		$query = $this->query('SELECT CASE WHEN (@@OPTIONS | 256) = @@OPTIONS THEN 1 ELSE 0 END AS qi');
+		$query = $query->row_array();
+		$this->_quoted_identifier = empty($query) ? FALSE : (bool) $query['qi'];
+		$this->_escape_char = ($this->_quoted_identifier) ? '"' : array('[', ']');
+
+		return $this->conn_id;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show table query
+	 *
+	 * Generates a platform-specific query string so that the table names can be fetched
+	 *
+	 * @param	bool
+	 * @return	string
+	 */
+	protected function _list_tables($prefix_limit = FALSE)
+	{
+		return 'SELECT '.$this->escape_identifiers('name')
+			.' FROM '.$this->escape_identifiers('sysobjects')
+			.' WHERE '.$this->escape_identifiers('type')." = 'U'";
+
+		if ($prefix_limit === TRUE && $this->dbprefix !== '')
+		{
+			$sql .= ' AND '.$this->escape_identifiers('name')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
+				.sprintf($this->_like_escape_str, $this->_like_escape_chr);
+		}
+
+		return $sql.' ORDER BY '.$this->escape_identifiers('name');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Show column query
+	 *
+	 * Generates a platform-specific query string so that the column names can be fetched
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _list_columns($table = '')
+	{
+		return 'SELECT '.$this->escape_identifiers('column_name')
+			.' FROM '.$this->escape_identifiers('information_schema.columns')
+			.' WHERE '.$this->escape_identifiers('table_name').' = '.$this->escape($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * From Tables
+	 *
+	 * This function implicitly groups FROM tables so there is no confusion
+	 * about operator precedence in harmony with SQL standards
+	 *
+	 * @param	array
+	 * @return	string
+	 */
+	protected function _from_tables($tables)
+	{
+		return is_array($tables) ? implode(', ', $tables) : $tables;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update statement
+	 *
+	 * Generates a platform-specific update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @param	array	the orderby clause (ignored)
+	 * @param	array	the limit clause (ignored)
+	 * @param	array	the like clause
+	 * @return	string
+         */
+	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+	{
+		foreach ($values as $key => $val)
+		{
+			$valstr[] = $key.' = '.$val;
+		}
+
+		$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
+
+		if ( ! empty($like))
+		{
+			$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
+		}
+
+		return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Delete statement
+	 *
+	 * Generates a platform-specific delete string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the where clause
+	 * @param	array	the like clause
+	 * @param	string	the limit clause
+	 * @return	string
+	 */
+	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+	{
+		$conditions = array();
+
+		empty($where) OR $conditions[] = implode(' ', $where);
+		empty($like) OR $conditions[] = implode(' ', $like);
+
+		$conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
+
+		return ($limit)
+			? 'WITH ci_delete AS (SELECT TOP '.$limit.' * FROM '.$table.$conditions.') DELETE FROM ci_delete'
+			: 'DELETE FROM '.$table.$conditions;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Limit string
+	 *
+	 * Generates a platform-specific LIMIT clause
+	 *
+	 * @param	string	the sql query string
+	 * @param	int	the number of rows to limit the query to
+	 * @param	int	the offset value
+	 * @return	string
+	 */
+	protected function _limit($sql, $limit, $offset)
+	{
+		// As of SQL Server 2012 (11.0.*) OFFSET is supported
+		if (version_compare($this->version(), '11', '>='))
+		{
+			return $sql.' OFFSET '.(int) $offset.' ROWS FETCH NEXT '.(int) $limit.' ROWS ONLY';
+		}
+
+		$limit = $offset + $limit;
+
+		// An ORDER BY clause is required for ROW_NUMBER() to work
+		if ($offset && ! empty($this->qb_orderby))
+		{
+			$orderby = 'ORDER BY '.implode(', ', $this->qb_orderby);
+
+			// We have to strip the ORDER BY clause
+			$sql = trim(substr($sql, 0, strrpos($sql, 'ORDER BY '.$orderby)));
+
+			return 'SELECT '.(count($this->qb_select) === 0 ? '*' : implode(', ', $this->qb_select))." FROM (\n"
+				.preg_replace('/^(SELECT( DISTINCT)?)/i', '\\1 ROW_NUMBER() OVER('.$orderby.') AS '.$this->escape_identifiers('CI_rownum').', ', $sql)
+				."\n) ".$this->escape_identifiers('CI_subquery')
+				."\nWHERE ".$this->escape_identifiers('CI_rownum').' BETWEEN '.((int) $offset + 1).' AND '.$limit;
+		}
+
+		return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$limit.' ', $sql);
+	}
+
+}
+
+/* End of file pdo_sqlsrv_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php */
diff --git a/system/database/drivers/postgre/postgre_driver.php b/system/database/drivers/postgre/postgre_driver.php
index e73122b..1d6e956 100644
--- a/system/database/drivers/postgre/postgre_driver.php
+++ b/system/database/drivers/postgre/postgre_driver.php
@@ -44,16 +44,6 @@
 
 	protected $_escape_char = '"';
 
-	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str = " ESCAPE '%s' ";
-	protected $_like_escape_chr = '!';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' RANDOM()'; // database specific random keyword
 
 	/**
@@ -138,7 +128,15 @@
 	 */
 	public function db_pconnect()
 	{
-		return @pg_pconnect($this->dsn);
+		$conn = @pg_pconnect($this->dsn);
+		if ($conn && pg_connection_status($conn) === PGSQL_CONNECTION_BAD)
+		{
+			if (pg_ping($conn) === FALSE)
+			{
+				return FALSE;
+			}
+		}
+		return $conn;
 	}
 
 	// --------------------------------------------------------------------
@@ -535,7 +533,7 @@
 		$cases = '';
 		foreach ($final as $k => $v)
 		{
-			$cases .= $k.' = (CASE '.$k."\n"
+			$cases .= $k.' = (CASE '.$index."\n"
 				.implode("\n", $v)."\n"
 				.'ELSE '.$k.' END), ';
 		}
diff --git a/system/database/drivers/postgre/postgre_result.php b/system/database/drivers/postgre/postgre_result.php
index f913bc9..eb9d647 100644
--- a/system/database/drivers/postgre/postgre_result.php
+++ b/system/database/drivers/postgre/postgre_result.php
@@ -33,6 +33,7 @@
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	1.3
  */
 class CI_DB_postgre_result extends CI_DB_result {
 
@@ -43,7 +44,9 @@
 	 */
 	public function num_rows()
 	{
-		return @pg_num_rows($this->result_id);
+		return is_int($this->num_rows)
+			? $this->num_rows
+			: $this->num_rows = @pg_num_rows($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -156,11 +159,12 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		return pg_fetch_object($this->result_id);
+		return pg_fetch_object($this->result_id, NULL, $class_name);
 	}
 
 }
diff --git a/system/database/drivers/sqlite/sqlite_driver.php b/system/database/drivers/sqlite/sqlite_driver.php
index 87be7a5..2744a63 100644
--- a/system/database/drivers/sqlite/sqlite_driver.php
+++ b/system/database/drivers/sqlite/sqlite_driver.php
@@ -45,16 +45,6 @@
 	// The character used to escape with - not needed for SQLite
 	protected $_escape_char = '"';
 
-	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str = " ESCAPE '%s' ";
-	protected $_like_escape_chr = '!';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' Random()'; // database specific random keyword
 
 	/**
diff --git a/system/database/drivers/sqlite/sqlite_result.php b/system/database/drivers/sqlite/sqlite_result.php
index 741dc9d..eef9787 100644
--- a/system/database/drivers/sqlite/sqlite_result.php
+++ b/system/database/drivers/sqlite/sqlite_result.php
@@ -33,6 +33,7 @@
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	1.3
  */
 class CI_DB_sqlite_result extends CI_DB_result {
 
@@ -43,7 +44,9 @@
 	 */
 	public function num_rows()
 	{
-		return @sqlite_num_rows($this->result_id);
+		return is_int($this->num_rows)
+			? $this->num_rows
+			: $this->num_rows = @sqlite_num_rows($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -140,17 +143,12 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		if (function_exists('sqlite_fetch_object'))
-		{
-			return sqlite_fetch_object($this->result_id);
-		}
-
-		$arr = sqlite_fetch_array($this->result_id, SQLITE_ASSOC);
-		return is_array($arr) ? (object) $arr : FALSE;
+		return sqlite_fetch_object($this->result_id, $class_name);
 	}
 
 }
diff --git a/system/database/drivers/sqlite3/sqlite3_driver.php b/system/database/drivers/sqlite3/sqlite3_driver.php
index 1c6533f..23145e7 100644
--- a/system/database/drivers/sqlite3/sqlite3_driver.php
+++ b/system/database/drivers/sqlite3/sqlite3_driver.php
@@ -46,16 +46,6 @@
 	// The character used for escaping
 	protected $_escape_char = '"';
 
-	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str = ' ESCAPE \'%s\' ';
-	protected $_like_escape_chr = '!';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' RANDOM()';
 
 	/**
diff --git a/system/database/drivers/sqlite3/sqlite3_forge.php b/system/database/drivers/sqlite3/sqlite3_forge.php
index 6a76ba9..f9ae5bc 100644
--- a/system/database/drivers/sqlite3/sqlite3_forge.php
+++ b/system/database/drivers/sqlite3/sqlite3_forge.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
  *
diff --git a/system/database/drivers/sqlite3/sqlite3_result.php b/system/database/drivers/sqlite3/sqlite3_result.php
index 946b365..117fb3c 100644
--- a/system/database/drivers/sqlite3/sqlite3_result.php
+++ b/system/database/drivers/sqlite3/sqlite3_result.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
  *
@@ -26,40 +26,21 @@
  */
 
 /**
- * SQLite Result Class
+ * SQLite3 Result Class
  *
  * This class extends the parent result class: CI_DB_result
  *
  * @category	Database
- * @author	Andrey Andreev
- * @link	http://codeigniter.com/user_guide/database/
+ * @author		Andrey Andreev
+ * @link		http://codeigniter.com/user_guide/database/
+ * @since	3.0
  */
 class CI_DB_sqlite3_result extends CI_DB_result {
 
-	// Overwriting the parent here, so we have a way to know if it's already set
-	public $num_rows;
-
 	// num_fields() might be called multiple times, so we'll use this one to cache it's result
 	protected $_num_fields;
 
 	/**
-	 * Number of rows in the result set
-	 *
-	 * @return	int
-	 */
-	public function num_rows()
-	{
-		/* The SQLite3 driver doesn't have a graceful way to do this,
-		 * so we'll have to do it on our own.
-		 */
-		return is_int($this->num_rows)
-			? $this->num_rows
-			: $this->num_rows = count($this->result_array());
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Number of fields in the result set
 	 *
 	 * @return	int
@@ -153,443 +134,28 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		// No native support for fetching as an object
-		$row = $this->_fetch_assoc();
-		return ($row !== FALSE) ? (object) $row : FALSE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result. "array" version.
-	 *
-	 * return	array
-	 */
-	public function result_array()
-	{
-		if (count($this->result_array) > 0)
+		// No native support for fetching rows as objects
+		if (($row = $this->result_id->fetchArray(SQLITE3_ASSOC)) === FALSE)
 		{
-			return $this->result_array;
+			return FALSE;
 		}
-		elseif (is_array($this->row_data))
+		elseif ($class_name === 'stdClass')
 		{
-			if (count($this->row_data) === 0)
-			{
-				return $this->result_array;
-			}
-			else
-			{
-				$row_index = count($this->row_data);
-			}
-		}
-		else
-		{
-			$row_index = 0;
-			$this->row_data = array();
-		}
-
-		$row = NULL;
-		while ($row = $this->_fetch_assoc())
-		{
-			$this->row_data[$row_index++] = $row;
-		}
-
-		return $this->result_array = $this->row_data;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result. "object" version.
-	 *
-	 * @return	array
-	 */
-	public function result_object()
-	{
-		if (count($this->result_object) > 0)
-		{
-			return $this->result_object;
-		}
-		elseif (count($this->result_array) > 0)
-		{
-			for ($i = 0, $c = count($this->result_array); $i < $c; $i++)
-			{
-				$this->result_object[] = (object) $this->result_array[$i];
-			}
-
-			return $this->result_object;
-		}
-		elseif (is_array($this->row_data))
-		{
-			if (count($this->row_data) === 0)
-			{
-				return $this->result_object;
-			}
-			else
-			{
-				$row_index = count($this->row_data);
-				for ($i = 0; $i < $row_index; $i++)
-				{
-					$this->result_object[$i] = (object) $this->row_data[$i];
-				}
-			}
-		}
-		else
-		{
-			$row_index = 0;
-			$this->row_data = array();
-		}
-
-		$row = NULL;
-		while ($row = $this->_fetch_assoc())
-		{
-			$this->row_data[$row_index] = $row;
-			$this->result_object[$row_index++] = (object) $row;
-		}
-
-		$this->result_array = $this->row_data;
-
-		/* As described for the num_rows() method - there's no easy
-		 * way to get the number of rows selected. Our work-around
-		 * solution (as in here as well) first checks if result_array
-		 * exists and returns its count. It doesn't however check for
-		 * custom_object_result, so - do it here.
-		 */
-		if ( ! is_int($this->num_rows))
-		{
-			$this->num_rows = count($this->result_object);
-		}
-
-		return $this->result_object;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Query result. Custom object version.
-	 *
-	 * @param	string	class name used to instantiate rows to
-	 * @return	array
-	 */
-	public function custom_result_object($class_name)
-	{
-		if (array_key_exists($class_name, $this->custom_result_object))
-		{
-			return $this->custom_result_object[$class_name];
-		}
-
-		if ( ! class_exists($class_name) OR ! is_object($this->result_id) OR $this->num_rows() === 0)
-		{
-			return array();
-		}
-
-		/* Even if result_array hasn't been set prior to custom_result_object being called,
-		 * num_rows() has done it.
-		*/
-		$data = &$this->result_array;
-
-		$result_object = array();
-		for ($i = 0, $c = count($data); $i < $c; $i++)
-		{
-			$result_object[$i] = new $class_name();
-			foreach ($data[$i] as $key => $value)
-			{
-				$result_object[$i]->$key = $value;
-			}
-		}
-
-		/* As described for the num_rows() method - there's no easy
-		 * way to get the number of rows selected. Our work-around
-		 * solution (as in here as well) first checks if result_array
-		 * exists and returns its count. It doesn't however check for
-		 * custom_object_result, so - do it here.
-		 */
-		if ( ! is_int($this->num_rows))
-		{
-			$this->num_rows = count($result_object);
-		}
-
-		// Cache and return the array
-		return $this->custom_result_object[$class_name] = $result_object;
-        }
-
-	// --------------------------------------------------------------------
-
-	/* Single row result.
-	 *
-	 * Acts as a wrapper for row_object(), row_array()
-	 * and custom_row_object(). Also used by first_row(), next_row()
-	 * and previous_row().
-	 *
-	 * @param	int	row index
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function row($n = 0, $type = 'object')
-	{
-		if ($type === 'object')
-		{
-			return $this->row_object($n);
-		}
-		elseif ($type === 'array')
-		{
-			return $this->row_array($n);
-		}
-
-		return $this->custom_row_object($n, $type);
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Single row result. Array version.
-	 *
-	 * @param	int	row index
-	 * @return	array
-	 */
-	public function row_array($n = 0)
-	{
-		// Make sure $n is not a string
-		if ( ! is_int($n))
-		{
-			$n = (int) $n;
-		}
-
-		/* If row_data is initialized, it means that we've already tried
-		 * (at least) to fetch some data, so ... check if we already have
-		 * this row.
-		*/
-		if (is_array($this->row_data))
-		{
-			/* If we already have row_data[$n] - return it.
-			 *
-			 * If we enter the elseif, there's a number of reasons to
-			 * return an empty array:
-			 *
-			 *	- count($this->row_data) === 0 means there are no results
-			 *	- num_rows being set or result_array having count() > 0 means
-			 *	  that we've already fetched all data and $n is greater than
-			 *	  our highest row index available
-			 *	- $n < $this->current_row means that if such row existed,
-			 *	  we would've already returned it, therefore $n is an
-			 *	  invalid index
-			 */
-			if (isset($this->row_data[$n])) // We already have this row
-			{
-				$this->current_row = $n;
-				return $this->row_data[$n];
-			}
-			elseif (count($this->row_data) === 0 OR is_int($this->num_rows)
-				OR count($this->result_array) > 0 OR $n < $this->current_row)
-			{
-				// No such row exists
-				return NULL;
-			}
-
-			// Get the next row index that would actually need to be fetched
-			$current_row = ($this->current_row < count($this->row_data)) ? count($this->row_data) : $this->current_row + 1;
-		}
-		else
-		{
-			$current_row = $this->current_row = 0;
-			$this->row_data = array();
-		}
-
-		/* Fetch more data, if available
-		 *
-		 * NOTE: Operator precedence is important here, if you change
-		 *	 'AND' with '&&' - it WILL BREAK the results, as
-		 *	 $row will be assigned the scalar value of both
-		 *	 expressions!
-		 */
-		while ($row = $this->_fetch_assoc() AND $current_row <= $n)
-		{
-			$this->row_data[$current_row++] = $row;
-		}
-
-		// This would mean that there's no (more) data to fetch
-		if ( ! is_array($this->row_data) OR ! isset($this->row_data[$n]))
-		{
-			// Cache what we already have
-			if (is_array($this->row_data))
-			{
-				$this->num_rows = count($this->row_data);
-				/* Usually, row_data could have less elements than result_array,
-				 * but at this point - they should be exactly the same.
-				 */
-				$this->result_array = $this->row_data;
-			}
-			else
-			{
-				$this->num_rows = 0;
-			}
-
-			return NULL;
-		}
-
-		$this->current_row = $n;
-		return $this->row_data[$n];
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Single row result. Object version.
-	 *
-	 * @param	int	row index
-	 * @return	mixed	object if row found; empty array if not
-	 */
-	public function row_object($n = 0)
-	{
-		// Make sure $n is not a string
-		if ( ! is_int($n))
-		{
-			$n = (int) $n;
-		}
-
-		/* Logic here is exactly the same as in row_array,
-		 * except we have to cast row_data[$n] to an object.
-		 *
-		 * If we already have result_object though - we can
-		 * directly return from it.
-		 */
-		if (isset($this->result_object[$n]))
-		{
-			$this->current_row = $n;
-			return $this->result_object[$n];
-		}
-
-		$row = $this->row_array($n);
-		// Cast only if the row exists
-		if (count($row) > 0)
-		{
-			$this->current_row = $n;
 			return (object) $row;
 		}
 
-		return NULL;
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Single row result. Custom object version.
-	 *
-	 * @param	int	row index
-	 * @param	string	custom class name
-	 * @return	mixed	custom object if row found; empty array otherwise
-	 */
-	public function custom_row_object($n = 0, $class_name)
-	{
-		// Make sure $n is not a string
-		if ( ! is_int($n))
+		$class_name = new $class_name();
+		foreach (array_keys($row) as $key)
 		{
-			$n = (int) $n;
+			$class_name->$key = $row[$key];
 		}
 
-		if (array_key_exists($class_name, $this->custom_result_object))
-		{
-			/* We already have a the whole result set with this class_name,
-			 * return the specified row if it exists, and an empty array if
-			 * it doesn't.
-			 */
-			if (isset($this->custom_result_object[$class_name][$n]))
-			{
-				$this->current_row = $n;
-				return $this->custom_result_object[$class_name][$n];
-			}
-			else
-			{
-				return NULL;
-			}
-		}
-		elseif ( ! class_exists($class_name)) // No such class exists
-		{
-			return NULL;
-		}
-
-		$row = $this->row_array($n);
-		// A non-array would mean that the row doesn't exist
-		if ( ! is_array($row))
-		{
-			return NULL;
-		}
-
-		// Convert to the desired class and return
-		$row_object = new $class_name();
-		foreach ($row as $key => $value)
-		{
-			$row_object->$key = $value;
-		}
-
-		$this->current_row = $n;
-		return $row_object;
-	}
-
-	// --------------------------------------------------------------------
-
-	/* First row result.
-	 *
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function first_row($type = 'object')
-	{
-		return $this->row(0, $type);
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Last row result.
-	 *
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function last_row($type = 'object')
-	{
-		$result = &$this->result($type);
-		if ( ! isset($this->num_rows))
-		{
-			$this->num_rows = count($result);
-		}
-		$this->current_row = $this->num_rows - 1;
-		return $result[$this->current_row];
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Next row result.
-	 *
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function next_row($type = 'object')
-	{
-		if (is_array($this->row_data))
-		{
-			$count = count($this->row_data);
-			$n = ($this->current_row > $count OR ($this->current_row === 0 && $count === 0)) ? $count : $this->current_row + 1;
-		}
-		else
-		{
-			$n = 0;
-		}
-
-		return $this->row($n, $type);
-	}
-
-	// --------------------------------------------------------------------
-
-	/* Previous row result.
-	 *
-	 * @param	string	('object', 'array' or a custom class name)
-	 * @return	mixed	whatever was passed to the second parameter
-	 */
-	public function previous_row($type = 'object')
-	{
-		$n = ($this->current_row !== 0) ? $this->current_row - 1 : 0;
-		return $this->row($n, $type);
+		return $class_name;
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/sqlite3/sqlite3_utility.php b/system/database/drivers/sqlite3/sqlite3_utility.php
index 965c838..f58c3d1 100644
--- a/system/database/drivers/sqlite3/sqlite3_utility.php
+++ b/system/database/drivers/sqlite3/sqlite3_utility.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
  *
diff --git a/system/database/drivers/sqlsrv/sqlsrv_driver.php b/system/database/drivers/sqlsrv/sqlsrv_driver.php
index 4fdc4aa..abcaf45 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_driver.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_driver.php
@@ -45,16 +45,6 @@
 	// The character used for escaping
 	protected $_escape_char = '"';
 
-	// clause and character used for LIKE escape sequences
-	protected $_like_escape_str = " ESCAPE '%s' ";
-	protected $_like_escape_chr = '!';
-
-	/**
-	 * The syntax to count rows is slightly different across different
-	 * database engines, so this string appears in each driver and is
-	 * used for the count_all() and count_all_results() functions.
-	 */
-	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' NEWID()';
 
 	// SQLSRV-specific properties
@@ -86,7 +76,7 @@
 			unset($connection['UID'], $connection['PWD']);
 		}
 
-		$conn_id = sqlsrv_connect($this->hostname, $connection);
+		$this->conn_id = sqlsrv_connect($this->hostname, $connection);
 
 		// Determine how identifiers are escaped
 		$query = $this->query('SELECT CASE WHEN (@@OPTIONS | 256) = @@OPTIONS THEN 1 ELSE 0 END AS qi');
@@ -94,7 +84,7 @@
 		$this->_quoted_identifier = empty($query) ? FALSE : (bool) $query['qi'];
 		$this->_escape_char = ($this->_quoted_identifier) ? '"' : array('[', ']');
 
-		return $conn_id;
+		return $this->conn_id;
 	}
 
 	// --------------------------------------------------------------------
@@ -143,7 +133,7 @@
 	 */
 	protected function _execute($sql)
 	{
-		return (is_write_type($sql) && stripos($sql, 'INSERT') === FALSE)
+		return ($this->is_write_type($sql) && stripos($sql, 'INSERT') === FALSE)
 			? sqlsrv_query($this->conn_id, $sql)
 			: sqlsrv_query($this->conn_id, $sql, NULL, array('Scrollable' => SQLSRV_CURSOR_STATIC));
 	}
@@ -231,7 +221,7 @@
 	 */
 	public function affected_rows()
 	{
-		return sqlrv_rows_affected($this->result_id);
+		return sqlsrv_rows_affected($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/sqlsrv/sqlsrv_result.php b/system/database/drivers/sqlsrv/sqlsrv_result.php
index f9d5a0d..fb7a686 100644
--- a/system/database/drivers/sqlsrv/sqlsrv_result.php
+++ b/system/database/drivers/sqlsrv/sqlsrv_result.php
@@ -21,7 +21,7 @@
  * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
  * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
  * @link		http://codeigniter.com
- * @since		Version 2.0.3
+ * @since		Version 1.0
  * @filesource
  */
 
@@ -33,6 +33,7 @@
  * @category	Database
  * @author		EllisLab Dev Team
  * @link		http://codeigniter.com/user_guide/database/
+ * @since	2.0.3
  */
 class CI_DB_sqlsrv_result extends CI_DB_result {
 
@@ -43,7 +44,9 @@
 	 */
 	public function num_rows()
 	{
-		return @sqlsrv_num_rows($this->result_id);
+		return is_int($this->num_rows)
+			? $this->num_rows
+			: $this->num_rows = @sqlsrv_num_rows($this->result_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -142,11 +145,12 @@
 	 *
 	 * Returns the result set as an object
 	 *
+	 * @param	string
 	 * @return	object
 	 */
-	protected function _fetch_object()
+	protected function _fetch_object($class_name = 'stdClass')
 	{
-		return sqlsrv_fetch_object($this->result_id);
+		return sqlsrv_fetch_object($this->result_id, $class_name);
 	}
 
 }
diff --git a/system/helpers/array_helper.php b/system/helpers/array_helper.php
index 6a7c8e3..ed2fe3c 100644
--- a/system/helpers/array_helper.php
+++ b/system/helpers/array_helper.php
@@ -43,16 +43,16 @@
 	 * Element
 	 *
 	 * Lets you determine whether an array index is set and whether it has a value.
-	 * If the element is empty it returns FALSE (or whatever you specify as the default value.)
+	 * If the element is empty it returns NULL (or whatever you specify as the default value.)
 	 *
 	 * @param	string
 	 * @param	array
 	 * @param	mixed
 	 * @return	mixed	depends on what the array contains
 	 */
-	function element($item, $array, $default = FALSE)
+	function element($item, $array, $default = NULL)
 	{
-		return empty($array[$item]) ? $default : $array[$item];
+		return array_key_exists($item, $array) ? $array[$item] : $default;
 	}
 }
 
@@ -87,7 +87,7 @@
 	 * @param	mixed
 	 * @return	mixed	depends on what the array contains
 	 */
-	function elements($items, $array, $default = FALSE)
+	function elements($items, $array, $default = NULL)
 	{
 		$return = array();
 
@@ -95,7 +95,7 @@
 
 		foreach ($items as $item)
 		{
-			$return[$item] = isset($array[$item]) ? $array[$item] : $default;
+			$return[$item] = array_key_exists($item, $array) ? $array[$item] : $default;
 		}
 
 		return $return;
diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php
index 4676b2a..3aac14d 100644
--- a/system/helpers/captcha_helper.php
+++ b/system/helpers/captcha_helper.php
@@ -32,7 +32,7 @@
  * @subpackage	Helpers
  * @category	Helpers
  * @author		EllisLab Dev Team
- * @link		http://codeigniter.com/user_guide/helpers/xml_helper.html
+ * @link		http://codeigniter.com/user_guide/helpers/captcha_helper.html
  */
 
 // ------------------------------------------------------------------------
@@ -80,8 +80,7 @@
 		$current_dir = @opendir($img_path);
 		while ($filename = @readdir($current_dir))
 		{
-			if ($filename !== '.' && $filename !== '..' && $filename !== 'index.html'
-				&& (str_replace('.jpg', '', $filename) + $expiration) < $now)
+			if (substr($filename, -4) === '.jpg' && (str_replace('.jpg', '', $filename) + $expiration) < $now)
 			{
 				@unlink($img_path.$filename);
 			}
@@ -186,7 +185,6 @@
 			}
 		}
 
-
 		// Create the border
 		imagerectangle($im, 0, 0, $img_width - 1, $img_height - 1, $border_color);
 
diff --git a/system/helpers/date_helper.php b/system/helpers/date_helper.php
index fc790c5..a792f09 100644
--- a/system/helpers/date_helper.php
+++ b/system/helpers/date_helper.php
@@ -117,26 +117,37 @@
 	 *
 	 * Returns a date formatted according to the submitted standard.
 	 *
+	 * As of PHP 5.2, the DateTime extension provides constants that
+	 * serve for the exact same purpose and are used with date().
+	 * Due to that, this function is DEPRECATED and should be removed
+	 * in CodeIgniter 3.1+.
+	 *
+	 * Here are two examples of how you should replace it:
+	 *
+	 *	date(DATE_RFC822, now()); // default
+	 *	date(DATE_W3C, $time); // a different format and time
+	 *
+	 * Reference: http://www.php.net/manual/en/class.datetime.php#datetime.constants.types
+	 *
+	 * @deprecated
 	 * @param	string	the chosen format
 	 * @param	int	Unix timestamp
 	 * @return	string
 	 */
-	function standard_date($fmt = 'DATE_RFC822', $time = '')
+	function standard_date($fmt = 'DATE_RFC822', $time = NULL)
 	{
-		$formats = array(
-				'DATE_ATOM'		=>	'%Y-%m-%dT%H:%i:%s%O',
-				'DATE_COOKIE'	=>	'%l, %d-%M-%y %H:%i:%s UTC',
-				'DATE_ISO8601'	=>	'%Y-%m-%dT%H:%i:%s%O',
-				'DATE_RFC822'	=>	'%D, %d %M %y %H:%i:%s %O',
-				'DATE_RFC850'	=>	'%l, %d-%M-%y %H:%i:%s UTC',
-				'DATE_RFC1036'	=>	'%D, %d %M %y %H:%i:%s %O',
-				'DATE_RFC1123'	=>	'%D, %d %M %Y %H:%i:%s %O',
-				'DATE_RFC2822'	=>	'%D, %d %M %Y %H:%i:%s %O',
-				'DATE_RSS'		=>	'%D, %d %M %Y %H:%i:%s %O',
-				'DATE_W3C'		=>	'%Y-%m-%dT%H:%i:%s%O'
-				);
+		if (empty($time))
+		{
+			$time = now();
+		}
 
-		return isset($formats[$fmt]) ? mdate($formats[$fmt], $time) : FALSE;
+		// Procedural style pre-defined constants from the DateTime extension
+		if (strpos($fmt, 'DATE_') !== 0 OR defined($fmt) === FALSE)
+		{
+			return FALSE;
+		}
+
+		return date(constant($fmt), $time);
 	}
 }
 
@@ -564,22 +575,7 @@
 			$menu .= ' class="'.$class.'"';
 		}
 
-		// Generate a string from the attributes submitted, if any
-		if (is_array($attributes))
-		{
-			$atts = '';
-			foreach ($attributes as $key => $val)
-			{
-				$atts .= ' '.$key.'="'.$val.'"';
-			}
-			$attributes = $atts;
-		}
-		elseif (is_string($attributes) && strlen($attributes) > 0)
-		{
-			$attributes = ' '.$attributes;
-		}
-
-		$menu .= $attributes.">\n";
+		$menu .= _stringify_attributes($attributes).">\n";
 
 		foreach (timezones() as $key => $val)
 		{
diff --git a/system/helpers/directory_helper.php b/system/helpers/directory_helper.php
index e7d3b5e..7d6b677 100644
--- a/system/helpers/directory_helper.php
+++ b/system/helpers/directory_helper.php
@@ -62,7 +62,7 @@
 			while (FALSE !== ($file = readdir($fp)))
 			{
 				// Remove '.', '..', and hidden files [optional]
-				if ( ! trim($file, '.') OR ($hidden === FALSE && $file[0] === '.'))
+				if ($file === '.' OR $file === '..' OR ($hidden === FALSE && $file[0] === '.'))
 				{
 					continue;
 				}
diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php
index 09c4de5..0232adf 100644
--- a/system/helpers/download_helper.php
+++ b/system/helpers/download_helper.php
@@ -95,7 +95,10 @@
 		}
 
 		// Clean output buffer
-		ob_clean();
+		if (ob_get_level() !== 0)
+		{
+			ob_clean();
+		}
 
 		// Generate the server headers
 		header('Content-Type: '.$mime);
diff --git a/system/helpers/email_helper.php b/system/helpers/email_helper.php
index 0516e93..2a63b36 100644
--- a/system/helpers/email_helper.php
+++ b/system/helpers/email_helper.php
@@ -45,9 +45,9 @@
 	 * @param	string
 	 * @return	bool
 	 */
-	function valid_email($address)
+	function valid_email($email)
 	{
-		return (bool) preg_match('/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix', $address);
+		return (bool) filter_var($email, FILTER_VALIDATE_EMAIL);
 	}
 }
 
diff --git a/system/helpers/file_helper.php b/system/helpers/file_helper.php
index 7270ee3..e68bb7f 100644
--- a/system/helpers/file_helper.php
+++ b/system/helpers/file_helper.php
@@ -32,7 +32,7 @@
  * @subpackage	Helpers
  * @category	Helpers
  * @author		EllisLab Dev Team
- * @link		http://codeigniter.com/user_guide/helpers/file_helpers.html
+ * @link		http://codeigniter.com/user_guide/helpers/file_helper.html
  */
 
 // ------------------------------------------------------------------------
@@ -124,7 +124,7 @@
 				{
 					delete_files($path.DIRECTORY_SEPARATOR.$filename, $del_dir, $level + 1, $htdocs);
 				}
-				elseif ($htdocs === TRUE && ! preg_match('/^(\.htaccess|index\.(html|htm|php)|web\.config)$/i', $filename))
+				elseif ($htdocs !== TRUE OR ! preg_match('/^(\.htaccess|index\.(html|htm|php)|web\.config)$/i', $filename))
 				{
 					@unlink($path.DIRECTORY_SEPARATOR.$filename);
 				}
diff --git a/system/helpers/form_helper.php b/system/helpers/form_helper.php
index 0c5d550..1bccac3 100644
--- a/system/helpers/form_helper.php
+++ b/system/helpers/form_helper.php
@@ -340,8 +340,13 @@
 		{
 			$key = (string) $key;
 
-			if (is_array($val) && ! empty($val))
+			if (is_array($val))
 			{
+				if (empty($val))
+				{
+					continue;
+				}
+
 				$form .= '<optgroup label="'.$key."\">\n";
 
 				foreach ($val as $optgroup_key => $optgroup_val)
diff --git a/system/helpers/html_helper.php b/system/helpers/html_helper.php
index 68ce702..2372e81 100644
--- a/system/helpers/html_helper.php
+++ b/system/helpers/html_helper.php
@@ -51,7 +51,7 @@
 	 */
 	function heading($data = '', $h = '1', $attributes = '')
 	{
-		return '<h'.$h.($attributes !== '' ? ' ' : '').$attributes.'>'.$data.'</h'.$h.'>';
+		return '<h'.$h._stringify_attributes($attributes).'>'.$data.'</h'.$h.'>';
 	}
 }
 
@@ -119,23 +119,8 @@
 		// Set the indentation based on the depth
 		$out = str_repeat(' ', $depth);
 
-		// Were any attributes submitted?  If so generate a string
-		if (is_array($attributes))
-		{
-			$atts = '';
-			foreach ($attributes as $key => $val)
-			{
-				$atts .= ' '.$key.'="'.$val.'"';
-			}
-			$attributes = $atts;
-		}
-		elseif (is_string($attributes) && strlen($attributes) > 0)
-		{
-			$attributes = ' '.$attributes;
-		}
-
 		// Write the opening list tag
-		$out .= '<'.$type.$attributes.">\n";
+		$out .= '<'.$type._stringify_attributes($attributes).">\n";
 
 		// Cycle through the list elements.  If an array is
 		// encountered we will recursively call _list()
@@ -191,9 +176,10 @@
 	 *
 	 * @param	mixed
 	 * @param	bool
+	 * @param	mixed
 	 * @return	string
 	 */
-	function img($src = '', $index_page = FALSE)
+	function img($src = '', $index_page = FALSE, $attributes = '')
 	{
 		if ( ! is_array($src) )
 		{
@@ -229,7 +215,7 @@
 			}
 		}
 
-		return $img.'/>';
+		return $img._stringify_attributes($attributes).' />';
 	}
 }
 
@@ -242,9 +228,9 @@
 	 *
 	 * Generates a page document type declaration
 	 *
-	 * Valid options are xhtml-11, xhtml-strict, xhtml-trans, xhtml-frame,
-	 * html4-strict, html4-trans, and html4-frame. Values are saved in the
-	 * doctypes config file.
+	 * Examples of valid options: html5, xhtml-11, xhtml-strict, xhtml-trans,
+	 * xhtml-frame, html4-strict, html4-trans, and html4-frame.
+	 * All values are saved in the doctypes config file.
 	 *
 	 * @param	string	type	The doctype to be generated
 	 * @return	string
diff --git a/system/helpers/path_helper.php b/system/helpers/path_helper.php
index fec4a1a..166fef0 100644
--- a/system/helpers/path_helper.php
+++ b/system/helpers/path_helper.php
@@ -32,7 +32,7 @@
  * @subpackage	Helpers
  * @category	Helpers
  * @author		EllisLab Dev Team
- * @link		http://codeigniter.com/user_guide/helpers/xml_helper.html
+ * @link		http://codeigniter.com/user_guide/helpers/path_helper.html
  */
 
 // ------------------------------------------------------------------------
diff --git a/system/helpers/security_helper.php b/system/helpers/security_helper.php
index 7968f9e..5ecc960 100644
--- a/system/helpers/security_helper.php
+++ b/system/helpers/security_helper.php
@@ -108,7 +108,8 @@
 	 */
 	function strip_image_tags($str)
 	{
-		return preg_replace(array('#<img\s+.*?src\s*=\s*["\'](.+?)["\'].*?\>#', '#<img\s+.*?src\s*=\s*(.+?).*?\>#'), '\\1', $str);
+		$CI =& get_instance();
+		return $CI->security->strip_image_tags($str);
 	}
 }
 
@@ -124,7 +125,7 @@
 	 */
 	function encode_php_tags($str)
 	{
-		return str_replace(array('<?', '?>'),  array('&lt;?', '?&gt;'), $str);
+		return str_replace(array('<?', '?>'), array('&lt;?', '?&gt;'), $str);
 	}
 }
 
diff --git a/system/helpers/text_helper.php b/system/helpers/text_helper.php
index 8a1f01b..b592f3c 100644
--- a/system/helpers/text_helper.php
+++ b/system/helpers/text_helper.php
@@ -89,7 +89,8 @@
 			return $str;
 		}
 
-		$str = preg_replace('/\s+/', ' ', str_replace(array("\r\n", "\r", "\n"), ' ', $str));
+		// a bit complicated, but faster than preg_replace with \s+
+		$str = preg_replace('/ {2,}/', ' ', str_replace(array("\r", "\n", "\t", "\x0B", "\x0C"), ' ', $str));
 
 		if (strlen($str) <= $n)
 		{
diff --git a/system/helpers/typography_helper.php b/system/helpers/typography_helper.php
index af9d16a..9dbba06 100644
--- a/system/helpers/typography_helper.php
+++ b/system/helpers/typography_helper.php
@@ -65,11 +65,11 @@
 	 * @param	bool	whether to reduce multiple instances of double newlines to two
 	 * @return	string
 	 */
-	function auto_typography($str, $strip_js_event_handlers = TRUE, $reduce_linebreaks = FALSE)
+	function auto_typography($str, $reduce_linebreaks = FALSE)
 	{
 		$CI =& get_instance();
 		$CI->load->library('typography');
-		return $CI->typography->auto_typography($str, $strip_js_event_handlers, $reduce_linebreaks);
+		return $CI->typography->auto_typography($str, $reduce_linebreaks);
 	}
 }
 
diff --git a/system/helpers/url_helper.php b/system/helpers/url_helper.php
index 40ce807..b1f5ecc 100644
--- a/system/helpers/url_helper.php
+++ b/system/helpers/url_helper.php
@@ -165,7 +165,7 @@
 
 		if ($attributes !== '')
 		{
-			$attributes = _parse_attributes($attributes);
+			$attributes = _stringify_attributes($attributes);
 		}
 
 		return '<a href="'.$site_url.'"'.$attributes.'>'.$title.'</a>';
@@ -221,10 +221,10 @@
 			unset($attributes[$key]);
 		}
 
-		$attributes = empty($attributes) ? '' : _parse_attributes($attributes);
+		$attributes = _stringify_attributes($attributes);
 
 		return '<a href="'.$site_url
-			.'" onclick="window.open(\''.$site_url."', '".$window_name."', '"._parse_attributes($atts, TRUE)."'); return false;\""
+			.'" onclick="window.open(\''.$site_url."', '".$window_name."', '"._stringify_attributes($atts, TRUE)."'); return false;\""
 			.$attributes.'>'.$title.'</a>';
 	}
 }
@@ -250,7 +250,7 @@
 			$title = $email;
 		}
 
-		return '<a href="mailto:'.$email.'"'._parse_attributes($attributes).'>'.$title.'</a>';
+		return '<a href="mailto:'.$email.'"'._stringify_attributes($attributes).'>'.$title.'</a>';
 	}
 }
 
@@ -526,7 +526,7 @@
 	 * @param	int
 	 * @return	string
 	 */
-	function redirect($uri = '', $method = 'auto', $http_response_code = 302)
+	function redirect($uri = '', $method = 'auto', $code = NULL)
 	{
 		if ( ! preg_match('#^https?://#i', $uri))
 		{
@@ -534,65 +534,31 @@
 		}
 
 		// IIS environment likely? Use 'refresh' for better compatibility
-		if (DIRECTORY_SEPARATOR !== '/' && $method === 'auto')
+		if ($method === 'auto' && isset($_SERVER['SERVER_SOFTWARE']) && strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== FALSE)
 		{
 			$method = 'refresh';
 		}
+		elseif ($method !== 'refresh' && (empty($code) OR ! is_numeric($code)))
+		{
+			// Reference: http://en.wikipedia.org/wiki/Post/Redirect/Get
+			$code = (isset($_SERVER['REQUEST_METHOD'], $_SERVER['SERVER_PROTOCOL'])
+					&& $_SERVER['REQUEST_METHOD'] === 'POST'
+					&& $_SERVER['SERVER_PROTOCOL'] === 'HTTP/1.1')
+				? 303 : 302;
+		}
 
-		switch($method)
+		switch ($method)
 		{
 			case 'refresh':
 				header('Refresh:0;url='.$uri);
 				break;
 			default:
-				header('Location: '.$uri, TRUE, $http_response_code);
+				header('Location: '.$uri, TRUE, $code);
 				break;
 		}
 		exit;
 	}
 }
 
-// ------------------------------------------------------------------------
-
-if ( ! function_exists('_parse_attributes'))
-{
-	/**
-	 * Parse out the attributes
-	 *
-	 * Some of the functions use this
-	 *
-	 * @param	array
-	 * @param	bool
-	 * @return	string
-	 */
-	function _parse_attributes($attributes, $javascript = FALSE)
-	{
-		if (is_string($attributes))
-		{
-			return ($attributes !== '') ? ' '.$attributes : '';
-		}
-
-		$att = '';
-		foreach ($attributes as $key => $val)
-		{
-			if ($javascript === TRUE)
-			{
-				$att .= $key.'='.$val.',';
-			}
-			else
-			{
-				$att .= ' '.$key.'="'.$val.'"';
-			}
-		}
-
-		if ($javascript === TRUE && $att !== '')
-		{
-			return substr($att, 0, -1);
-		}
-
-		return $att;
-	}
-}
-
 /* End of file url_helper.php */
 /* Location: ./system/helpers/url_helper.php */
\ No newline at end of file
diff --git a/system/language/english/calendar_lang.php b/system/language/english/calendar_lang.php
index 48939d4..a70a564 100644
--- a/system/language/english/calendar_lang.php
+++ b/system/language/english/calendar_lang.php
@@ -25,52 +25,51 @@
  * @filesource
  */
 
-$lang['cal_su']			= "Su";
-$lang['cal_mo']			= "Mo";
-$lang['cal_tu']			= "Tu";
-$lang['cal_we']			= "We";
-$lang['cal_th']			= "Th";
-$lang['cal_fr']			= "Fr";
-$lang['cal_sa']			= "Sa";
-$lang['cal_sun']		= "Sun";
-$lang['cal_mon']		= "Mon";
-$lang['cal_tue']		= "Tue";
-$lang['cal_wed']		= "Wed";
-$lang['cal_thu']		= "Thu";
-$lang['cal_fri']		= "Fri";
-$lang['cal_sat']		= "Sat";
-$lang['cal_sunday']		= "Sunday";
-$lang['cal_monday']		= "Monday";
-$lang['cal_tuesday']	= "Tuesday";
-$lang['cal_wednesday']	= "Wednesday";
-$lang['cal_thursday']	= "Thursday";
-$lang['cal_friday']		= "Friday";
-$lang['cal_saturday']	= "Saturday";
-$lang['cal_jan']		= "Jan";
-$lang['cal_feb']		= "Feb";
-$lang['cal_mar']		= "Mar";
-$lang['cal_apr']		= "Apr";
-$lang['cal_may']		= "May";
-$lang['cal_jun']		= "Jun";
-$lang['cal_jul']		= "Jul";
-$lang['cal_aug']		= "Aug";
-$lang['cal_sep']		= "Sep";
-$lang['cal_oct']		= "Oct";
-$lang['cal_nov']		= "Nov";
-$lang['cal_dec']		= "Dec";
-$lang['cal_january']	= "January";
-$lang['cal_february']	= "February";
-$lang['cal_march']		= "March";
-$lang['cal_april']		= "April";
-$lang['cal_mayl']		= "May";
-$lang['cal_june']		= "June";
-$lang['cal_july']		= "July";
-$lang['cal_august']		= "August";
-$lang['cal_september']	= "September";
-$lang['cal_october']	= "October";
-$lang['cal_november']	= "November";
-$lang['cal_december']	= "December";
-
+$lang['cal_su']			= 'Su';
+$lang['cal_mo']			= 'Mo';
+$lang['cal_tu']			= 'Tu';
+$lang['cal_we']			= 'We';
+$lang['cal_th']			= 'Th';
+$lang['cal_fr']			= 'Fr';
+$lang['cal_sa']			= 'Sa';
+$lang['cal_sun']		= 'Sun';
+$lang['cal_mon']		= 'Mon';
+$lang['cal_tue']		= 'Tue';
+$lang['cal_wed']		= 'Wed';
+$lang['cal_thu']		= 'Thu';
+$lang['cal_fri']		= 'Fri';
+$lang['cal_sat']		= 'Sat';
+$lang['cal_sunday']		= 'Sunday';
+$lang['cal_monday']		= 'Monday';
+$lang['cal_tuesday']	= 'Tuesday';
+$lang['cal_wednesday']	= 'Wednesday';
+$lang['cal_thursday']	= 'Thursday';
+$lang['cal_friday']		= 'Friday';
+$lang['cal_saturday']	= 'Saturday';
+$lang['cal_jan']		= 'Jan';
+$lang['cal_feb']		= 'Feb';
+$lang['cal_mar']		= 'Mar';
+$lang['cal_apr']		= 'Apr';
+$lang['cal_may']		= 'May';
+$lang['cal_jun']		= 'Jun';
+$lang['cal_jul']		= 'Jul';
+$lang['cal_aug']		= 'Aug';
+$lang['cal_sep']		= 'Sep';
+$lang['cal_oct']		= 'Oct';
+$lang['cal_nov']		= 'Nov';
+$lang['cal_dec']		= 'Dec';
+$lang['cal_january']	= 'January';
+$lang['cal_february']	= 'February';
+$lang['cal_march']		= 'March';
+$lang['cal_april']		= 'April';
+$lang['cal_mayl']		= 'May';
+$lang['cal_june']		= 'June';
+$lang['cal_july']		= 'July';
+$lang['cal_august']		= 'August';
+$lang['cal_september']	= 'September';
+$lang['cal_october']	= 'October';
+$lang['cal_november']	= 'November';
+$lang['cal_december']	= 'December';
 
 /* End of file calendar_lang.php */
 /* Location: ./system/language/english/calendar_lang.php */
\ No newline at end of file
diff --git a/system/language/english/date_lang.php b/system/language/english/date_lang.php
index 38532b7..6683e4c 100644
--- a/system/language/english/date_lang.php
+++ b/system/language/english/date_lang.php
@@ -25,20 +25,20 @@
  * @filesource
  */
 
-$lang['date_year'] = "Year";
-$lang['date_years'] = "Years";
-$lang['date_month'] = "Month";
-$lang['date_months'] = "Months";
-$lang['date_week'] = "Week";
-$lang['date_weeks'] = "Weeks";
-$lang['date_day'] = "Day";
-$lang['date_days'] = "Days";
-$lang['date_hour'] = "Hour";
-$lang['date_hours'] = "Hours";
-$lang['date_minute'] = "Minute";
-$lang['date_minutes'] = "Minutes";
-$lang['date_second'] = "Second";
-$lang['date_seconds'] = "Seconds";
+$lang['date_year'] = 'Year';
+$lang['date_years'] = 'Years';
+$lang['date_month'] = 'Month';
+$lang['date_months'] = 'Months';
+$lang['date_week'] = 'Week';
+$lang['date_weeks'] = 'Weeks';
+$lang['date_day'] = 'Day';
+$lang['date_days'] = 'Days';
+$lang['date_hour'] = 'Hour';
+$lang['date_hours'] = 'Hours';
+$lang['date_minute'] = 'Minute';
+$lang['date_minutes'] = 'Minutes';
+$lang['date_second'] = 'Second';
+$lang['date_seconds'] = 'Seconds';
 
 $lang['UM12']	= '(UTC -12:00) Baker/Howland Island';
 $lang['UM11']	= '(UTC -11:00) Niue';
@@ -81,6 +81,5 @@
 $lang['UP13']	= '(UTC +13:00) Samoa Time Zone, Phoenix Islands Time, Tonga';
 $lang['UP14']	= '(UTC +14:00) Line Islands';
 
-
 /* End of file date_lang.php */
 /* Location: ./system/language/english/date_lang.php */
\ No newline at end of file
diff --git a/system/language/english/email_lang.php b/system/language/english/email_lang.php
index 95a16d1..0de9aa2 100644
--- a/system/language/english/email_lang.php
+++ b/system/language/english/email_lang.php
@@ -25,25 +25,24 @@
  * @filesource
  */
 
-$lang['email_must_be_array'] = "The email validation method must be passed an array.";
-$lang['email_invalid_address'] = "Invalid email address: %s";
-$lang['email_attachment_missing'] = "Unable to locate the following email attachment: %s";
-$lang['email_attachment_unreadable'] = "Unable to open this attachment: %s";
-$lang['email_no_recipients'] = "You must include recipients: To, Cc, or Bcc";
-$lang['email_send_failure_phpmail'] = "Unable to send email using PHP mail().  Your server might not be configured to send mail using this method.";
-$lang['email_send_failure_sendmail'] = "Unable to send email using PHP Sendmail.  Your server might not be configured to send mail using this method.";
-$lang['email_send_failure_smtp'] = "Unable to send email using PHP SMTP.  Your server might not be configured to send mail using this method.";
-$lang['email_sent'] = "Your message has been successfully sent using the following protocol: %s";
-$lang['email_no_socket'] = "Unable to open a socket to Sendmail. Please check settings.";
-$lang['email_no_hostname'] = "You did not specify a SMTP hostname.";
-$lang['email_smtp_error'] = "The following SMTP error was encountered: %s";
-$lang['email_no_smtp_unpw'] = "Error: You must assign a SMTP username and password.";
-$lang['email_failed_smtp_login'] = "Failed to send AUTH LOGIN command. Error: %s";
-$lang['email_smtp_auth_un'] = "Failed to authenticate username. Error: %s";
-$lang['email_smtp_auth_pw'] = "Failed to authenticate password. Error: %s";
-$lang['email_smtp_data_failure'] = "Unable to send data: %s";
-$lang['email_exit_status'] = "Exit status code: %s";
-
+$lang['email_must_be_array'] = 'The email validation method must be passed an array.';
+$lang['email_invalid_address'] = 'Invalid email address: %s';
+$lang['email_attachment_missing'] = 'Unable to locate the following email attachment: %s';
+$lang['email_attachment_unreadable'] = 'Unable to open this attachment: %s';
+$lang['email_no_recipients'] = 'You must include recipients: To, Cc, or Bcc';
+$lang['email_send_failure_phpmail'] = 'Unable to send email using PHP mail(). Your server might not be configured to send mail using this method.';
+$lang['email_send_failure_sendmail'] = 'Unable to send email using PHP Sendmail. Your server might not be configured to send mail using this method.';
+$lang['email_send_failure_smtp'] = 'Unable to send email using PHP SMTP. Your server might not be configured to send mail using this method.';
+$lang['email_sent'] = 'Your message has been successfully sent using the following protocol: %s';
+$lang['email_no_socket'] = 'Unable to open a socket to Sendmail. Please check settings.';
+$lang['email_no_hostname'] = 'You did not specify a SMTP hostname.';
+$lang['email_smtp_error'] = 'The following SMTP error was encountered: %s';
+$lang['email_no_smtp_unpw'] = 'Error: You must assign a SMTP username and password.';
+$lang['email_failed_smtp_login'] = 'Failed to send AUTH LOGIN command. Error: %s';
+$lang['email_smtp_auth_un'] = 'Failed to authenticate username. Error: %s';
+$lang['email_smtp_auth_pw'] = 'Failed to authenticate password. Error: %s';
+$lang['email_smtp_data_failure'] = 'Unable to send data: %s';
+$lang['email_exit_status'] = 'Exit status code: %s';
 
 /* End of file email_lang.php */
 /* Location: ./system/language/english/email_lang.php */
\ No newline at end of file
diff --git a/system/language/english/form_validation_lang.php b/system/language/english/form_validation_lang.php
index eb4624e..cf1b3b5 100644
--- a/system/language/english/form_validation_lang.php
+++ b/system/language/english/form_validation_lang.php
@@ -25,32 +25,31 @@
  * @filesource
  */
 
-$lang['required']				= "The %s field is required.";
-$lang['isset']					= "The %s field must have a value.";
-$lang['valid_email']			= "The %s field must contain a valid email address.";
-$lang['valid_emails']			= "The %s field must contain all valid email addresses.";
-$lang['valid_url']				= "The %s field must contain a valid URL.";
-$lang['valid_ip']				= "The %s field must contain a valid IP.";
-$lang['min_length']				= "The %s field must be at least %s characters in length.";
-$lang['max_length']				= "The %s field cannot exceed %s characters in length.";
-$lang['exact_length']			= "The %s field must be exactly %s characters in length.";
-$lang['alpha']					= "The %s field may only contain alphabetical characters.";
-$lang['alpha_numeric']			= "The %s field may only contain alpha-numeric characters.";
-$lang['alpha_dash']				= "The %s field may only contain alpha-numeric characters, underscores, and dashes.";
-$lang['numeric']				= "The %s field must contain only numbers.";
-$lang['is_numeric']				= "The %s field must contain only numeric characters.";
-$lang['integer']				= "The %s field must contain an integer.";
-$lang['regex_match']			= "The %s field is not in the correct format.";
-$lang['matches']				= "The %s field does not match the %s field.";
-$lang['is_unique'] 				= "The %s field must contain a unique value.";
-$lang['is_natural']				= "The %s field must contain only positive numbers.";
-$lang['is_natural_no_zero']		= "The %s field must contain a number greater than zero.";
-$lang['decimal']				= "The %s field must contain a decimal number.";
-$lang['less_than']				= "The %s field must contain a number less than %s.";
-$lang['less_than_equal_to']		= "The %s field must contain a number less than or equal to %s.";
-$lang['greater_than']			= "The %s field must contain a number greater than %s.";
-$lang['greater_than_equal_to']	= "The %s field must contain a number greater than or equal to %s.";
-
+$lang['required']				= 'The %s field is required.';
+$lang['isset']					= 'The %s field must have a value.';
+$lang['valid_email']			= 'The %s field must contain a valid email address.';
+$lang['valid_emails']			= 'The %s field must contain all valid email addresses.';
+$lang['valid_url']				= 'The %s field must contain a valid URL.';
+$lang['valid_ip']				= 'The %s field must contain a valid IP.';
+$lang['min_length']				= 'The %s field must be at least %s characters in length.';
+$lang['max_length']				= 'The %s field cannot exceed %s characters in length.';
+$lang['exact_length']			= 'The %s field must be exactly %s characters in length.';
+$lang['alpha']					= 'The %s field may only contain alphabetical characters.';
+$lang['alpha_numeric']			= 'The %s field may only contain alpha-numeric characters.';
+$lang['alpha_dash']				= 'The %s field may only contain alpha-numeric characters, underscores, and dashes.';
+$lang['numeric']				= 'The %s field must contain only numbers.';
+$lang['is_numeric']				= 'The %s field must contain only numeric characters.';
+$lang['integer']				= 'The %s field must contain an integer.';
+$lang['regex_match']			= 'The %s field is not in the correct format.';
+$lang['matches']				= 'The %s field does not match the %s field.';
+$lang['is_unique'] 				= 'The %s field must contain a unique value.';
+$lang['is_natural']				= 'The %s field must only contain digits.';
+$lang['is_natural_no_zero']		= 'The %s field must only contain digits and must be greater than zero.';
+$lang['decimal']				= 'The %s field must contain a decimal number.';
+$lang['less_than']				= 'The %s field must contain a number less than %s.';
+$lang['less_than_equal_to']		= 'The %s field must contain a number less than or equal to %s.';
+$lang['greater_than']			= 'The %s field must contain a number greater than %s.';
+$lang['greater_than_equal_to']	= 'The %s field must contain a number greater than or equal to %s.';
 
 /* End of file form_validation_lang.php */
-/* Location: ./system/language/english/form_validation_lang.php */
+/* Location: ./system/language/english/form_validation_lang.php */
\ No newline at end of file
diff --git a/system/language/english/ftp_lang.php b/system/language/english/ftp_lang.php
index d00126b..24923c8 100644
--- a/system/language/english/ftp_lang.php
+++ b/system/language/english/ftp_lang.php
@@ -25,19 +25,18 @@
  * @filesource
  */
 
-$lang['ftp_no_connection']			= "Unable to locate a valid connection ID. Please make sure you are connected before peforming any file routines.";
-$lang['ftp_unable_to_connect']		= "Unable to connect to your FTP server using the supplied hostname.";
-$lang['ftp_unable_to_login']		= "Unable to login to your FTP server. Please check your username and password.";
-$lang['ftp_unable_to_makdir']		= "Unable to create the directory you have specified.";
-$lang['ftp_unable_to_changedir']	= "Unable to change directories.";
-$lang['ftp_unable_to_chmod']		= "Unable to set file permissions. Please check your path. Note: This feature is only available in PHP 5 or higher.";
-$lang['ftp_unable_to_upload']		= "Unable to upload the specified file. Please check your path.";
-$lang['ftp_unable_to_download']		= "Unable to download the specified file. Please check your path.";
-$lang['ftp_no_source_file']			= "Unable to locate the source file. Please check your path.";
-$lang['ftp_unable_to_rename']		= "Unable to rename the file.";
-$lang['ftp_unable_to_delete']		= "Unable to delete the file.";
-$lang['ftp_unable_to_move']			= "Unable to move the file. Please make sure the destination directory exists.";
-
+$lang['ftp_no_connection']			= 'Unable to locate a valid connection ID. Please make sure you are connected before peforming any file routines.';
+$lang['ftp_unable_to_connect']		= 'Unable to connect to your FTP server using the supplied hostname.';
+$lang['ftp_unable_to_login']		= 'Unable to login to your FTP server. Please check your username and password.';
+$lang['ftp_unable_to_makdir']		= 'Unable to create the directory you have specified.';
+$lang['ftp_unable_to_changedir']	= 'Unable to change directories.';
+$lang['ftp_unable_to_chmod']		= 'Unable to set file permissions. Please check your path. Note: This feature is only available in PHP 5 or higher.';
+$lang['ftp_unable_to_upload']		= 'Unable to upload the specified file. Please check your path.';
+$lang['ftp_unable_to_download']		= 'Unable to download the specified file. Please check your path.';
+$lang['ftp_no_source_file']			= 'Unable to locate the source file. Please check your path.';
+$lang['ftp_unable_to_rename']		= 'Unable to rename the file.';
+$lang['ftp_unable_to_delete']		= 'Unable to delete the file.';
+$lang['ftp_unable_to_move']			= 'Unable to move the file. Please make sure the destination directory exists.';
 
 /* End of file ftp_lang.php */
 /* Location: ./system/language/english/ftp_lang.php */
\ No newline at end of file
diff --git a/system/language/english/imglib_lang.php b/system/language/english/imglib_lang.php
index 67a36e1..d755437 100644
--- a/system/language/english/imglib_lang.php
+++ b/system/language/english/imglib_lang.php
@@ -25,25 +25,24 @@
  * @filesource
  */
 
-$lang['imglib_source_image_required'] = "You must specify a source image in your preferences.";
-$lang['imglib_gd_required'] = "The GD image library is required for this feature.";
-$lang['imglib_gd_required_for_props'] = "Your server must support the GD image library in order to determine the image properties.";
-$lang['imglib_unsupported_imagecreate'] = "Your server does not support the GD function required to process this type of image.";
-$lang['imglib_gif_not_supported'] = "GIF images are often not supported due to licensing restrictions.  You may have to use JPG or PNG images instead.";
-$lang['imglib_jpg_not_supported'] = "JPG images are not supported.";
-$lang['imglib_png_not_supported'] = "PNG images are not supported.";
-$lang['imglib_jpg_or_png_required'] = "The image resize protocol specified in your preferences only works with JPEG or PNG image types.";
-$lang['imglib_copy_error'] = "An error was encountered while attempting to replace the file.  Please make sure your file directory is writable.";
-$lang['imglib_rotate_unsupported'] = "Image rotation does not appear to be supported by your server.";
-$lang['imglib_libpath_invalid'] = "The path to your image library is not correct.  Please set the correct path in your image preferences.";
-$lang['imglib_image_process_failed'] = "Image processing failed.  Please verify that your server supports the chosen protocol and that the path to your image library is correct.";
-$lang['imglib_rotation_angle_required'] = "An angle of rotation is required to rotate the image.";
-$lang['imglib_writing_failed_gif'] = "GIF image.";
-$lang['imglib_invalid_path'] = "The path to the image is not correct.";
-$lang['imglib_copy_failed'] = "The image copy routine failed.";
-$lang['imglib_missing_font'] = "Unable to find a font to use.";
-$lang['imglib_save_failed'] = "Unable to save the image.  Please make sure the image and file directory are writable.";
-
+$lang['imglib_source_image_required'] = 'You must specify a source image in your preferences.';
+$lang['imglib_gd_required'] = 'The GD image library is required for this feature.';
+$lang['imglib_gd_required_for_props'] = 'Your server must support the GD image library in order to determine the image properties.';
+$lang['imglib_unsupported_imagecreate'] = 'Your server does not support the GD function required to process this type of image.';
+$lang['imglib_gif_not_supported'] = 'GIF images are often not supported due to licensing restrictions. You may have to use JPG or PNG images instead.';
+$lang['imglib_jpg_not_supported'] = 'JPG images are not supported.';
+$lang['imglib_png_not_supported'] = 'PNG images are not supported.';
+$lang['imglib_jpg_or_png_required'] = 'The image resize protocol specified in your preferences only works with JPEG or PNG image types.';
+$lang['imglib_copy_error'] = 'An error was encountered while attempting to replace the file. Please make sure your file directory is writable.';
+$lang['imglib_rotate_unsupported'] = 'Image rotation does not appear to be supported by your server.';
+$lang['imglib_libpath_invalid'] = 'The path to your image library is not correct. Please set the correct path in your image preferences.';
+$lang['imglib_image_process_failed'] = 'Image processing failed. Please verify that your server supports the chosen protocol and that the path to your image library is correct.';
+$lang['imglib_rotation_angle_required'] = 'An angle of rotation is required to rotate the image.';
+$lang['imglib_writing_failed_gif'] = 'GIF image.';
+$lang['imglib_invalid_path'] = 'The path to the image is not correct.';
+$lang['imglib_copy_failed'] = 'The image copy routine failed.';
+$lang['imglib_missing_font'] = 'Unable to find a font to use.';
+$lang['imglib_save_failed'] = 'Unable to save the image. Please make sure the image and file directory are writable.';
 
 /* End of file imglib_lang.php */
 /* Location: ./system/language/english/imglib_lang.php */
\ No newline at end of file
diff --git a/system/language/english/migration_lang.php b/system/language/english/migration_lang.php
index af92066..5753c00 100644
--- a/system/language/english/migration_lang.php
+++ b/system/language/english/migration_lang.php
@@ -25,13 +25,13 @@
  * @filesource
  */
 
-$lang['migration_none_found']			= "No migrations were found.";
-$lang['migration_not_found']			= "No migration could be found with the version number: %d.";
-$lang['migration_multiple_version']		= "This are multiple migrations with the same version number: %d.";
-$lang['migration_class_doesnt_exist']	= "The migration class \"%s\" could not be found.";
-$lang['migration_missing_up_method']	= "The migration class \"%s\" is missing an 'up' method.";
-$lang['migration_missing_down_method']	= "The migration class \"%s\" is missing a 'down' method.";
-$lang['migration_invalid_filename']		= "Migration \"%s\" has an invalid filename.";
+$lang['migration_none_found']			= 'No migrations were found.';
+$lang['migration_not_found']			= 'No migration could be found with the version number: %d.';
+$lang['migration_multiple_version']		= 'There are multiple migrations with the same version number: %d.';
+$lang['migration_class_doesnt_exist']	= 'The migration class "%s" could not be found.';
+$lang['migration_missing_up_method']	= 'The migration class "%s" is missing an "up" method.';
+$lang['migration_missing_down_method']	= 'The migration class "%s" is missing a "down" method.';
+$lang['migration_invalid_filename']		= 'Migration "%s" has an invalid filename.';
 
 
 /* End of file migration_lang.php */
diff --git a/system/language/english/unit_test_lang.php b/system/language/english/unit_test_lang.php
index 36e9aca..146ec25 100644
--- a/system/language/english/unit_test_lang.php
+++ b/system/language/english/unit_test_lang.php
@@ -45,6 +45,5 @@
 $lang['ut_null']			= 'Null';
 $lang['ut_notes']			= 'Notes';
 
-
 /* End of file unit_test_lang.php */
 /* Location: ./system/language/english/unit_test_lang.php */
\ No newline at end of file
diff --git a/system/language/english/upload_lang.php b/system/language/english/upload_lang.php
index c3cb9c3..d70e7f2 100644
--- a/system/language/english/upload_lang.php
+++ b/system/language/english/upload_lang.php
@@ -25,23 +25,22 @@
  * @filesource
  */
 
-$lang['upload_userfile_not_set'] = "Unable to find a post variable called userfile.";
-$lang['upload_file_exceeds_limit'] = "The uploaded file exceeds the maximum allowed size in your PHP configuration file.";
-$lang['upload_file_exceeds_form_limit'] = "The uploaded file exceeds the maximum size allowed by the submission form.";
-$lang['upload_file_partial'] = "The file was only partially uploaded.";
-$lang['upload_no_temp_directory'] = "The temporary folder is missing.";
-$lang['upload_unable_to_write_file'] = "The file could not be written to disk.";
-$lang['upload_stopped_by_extension'] = "The file upload was stopped by extension.";
-$lang['upload_no_file_selected'] = "You did not select a file to upload.";
-$lang['upload_invalid_filetype'] = "The filetype you are attempting to upload is not allowed.";
-$lang['upload_invalid_filesize'] = "The file you are attempting to upload is larger than the permitted size.";
-$lang['upload_invalid_dimensions'] = "The image you are attempting to upload exceeds the maximum height or width.";
-$lang['upload_destination_error'] = "A problem was encountered while attempting to move the uploaded file to the final destination.";
-$lang['upload_no_filepath'] = "The upload path does not appear to be valid.";
-$lang['upload_no_file_types'] = "You have not specified any allowed file types.";
-$lang['upload_bad_filename'] = "The file name you submitted already exists on the server.";
-$lang['upload_not_writable'] = "The upload destination folder does not appear to be writable.";
-
+$lang['upload_userfile_not_set'] = 'Unable to find a post variable called userfile.';
+$lang['upload_file_exceeds_limit'] = 'The uploaded file exceeds the maximum allowed size in your PHP configuration file.';
+$lang['upload_file_exceeds_form_limit'] = 'The uploaded file exceeds the maximum size allowed by the submission form.';
+$lang['upload_file_partial'] = 'The file was only partially uploaded.';
+$lang['upload_no_temp_directory'] = 'The temporary folder is missing.';
+$lang['upload_unable_to_write_file'] = 'The file could not be written to disk.';
+$lang['upload_stopped_by_extension'] = 'The file upload was stopped by extension.';
+$lang['upload_no_file_selected'] = 'You did not select a file to upload.';
+$lang['upload_invalid_filetype'] = 'The filetype you are attempting to upload is not allowed.';
+$lang['upload_invalid_filesize'] = 'The file you are attempting to upload is larger than the permitted size.';
+$lang['upload_invalid_dimensions'] = 'The image you are attempting to upload exceeds the maximum height or width.';
+$lang['upload_destination_error'] = 'A problem was encountered while attempting to move the uploaded file to the final destination.';
+$lang['upload_no_filepath'] = 'The upload path does not appear to be valid.';
+$lang['upload_no_file_types'] = 'You have not specified any allowed file types.';
+$lang['upload_bad_filename'] = 'The file name you submitted already exists on the server.';
+$lang['upload_not_writable'] = 'The upload destination folder does not appear to be writable.';
 
 /* End of file upload_lang.php */
 /* Location: ./system/language/english/upload_lang.php */
\ No newline at end of file
diff --git a/system/libraries/Cache/drivers/Cache_wincache.php b/system/libraries/Cache/drivers/Cache_wincache.php
index 74048d5..89e9f77 100644
--- a/system/libraries/Cache/drivers/Cache_wincache.php
+++ b/system/libraries/Cache/drivers/Cache_wincache.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
  *
diff --git a/system/libraries/Driver.php b/system/libraries/Driver.php
index d67ee25..1d084c8 100644
--- a/system/libraries/Driver.php
+++ b/system/libraries/Driver.php
@@ -54,13 +54,29 @@
 	protected $lib_name;
 
 	/**
+	 * Get magic method
+	 *
 	 * The first time a child is used it won't exist, so we instantiate it
 	 * subsequents calls will go straight to the proper child.
 	 *
-	 * @param	mixed	$child
-	 * @return	mixed
+	 * @param   string  Child class name
+	 * @return  object  Child class
 	 */
 	public function __get($child)
+    {
+		// Try to load the driver
+		return $this->load_driver($child);
+	}
+
+	/**
+	 * Load driver
+	 *
+	 * Separate load_driver call to support explicit driver load by library or user
+	 *
+	 * @param   string  Child class name
+	 * @return  object  Child class
+	 */
+	public function load_driver($child)
 	{
 		if ( ! isset($this->lib_name))
 		{
@@ -268,4 +284,4 @@
 }
 
 /* End of file Driver.php */
-/* Location: ./system/libraries/Driver.php */
\ No newline at end of file
+/* Location: ./system/libraries/Driver.php */
diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index 9270d5f..84ea165 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -715,9 +715,9 @@
 	 * @param	string
 	 * @return	bool
 	 */
-	public function valid_email($address)
+	public function valid_email($email)
 	{
-		return (bool) preg_match('/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix', $address);
+		return (bool) filter_var($email, FILTER_VALIDATE_EMAIL);
 	}
 
 	// --------------------------------------------------------------------
@@ -1247,7 +1247,7 @@
 	 *
 	 * @return	bool
 	 */
-	public function send()
+	public function send($auto_clear = TRUE)
 	{
 		if ($this->_replyto_flag === FALSE)
 		{
@@ -1266,11 +1266,25 @@
 
 		if ($this->bcc_batch_mode && count($this->_bcc_array) > $this->bcc_batch_size)
 		{
-			return $this->batch_bcc_send();
+			$result = $this->batch_bcc_send();
+
+			if ($result && $auto_clear)
+			{
+				$this->clear();
+			}
+
+			return $result;
 		}
 
 		$this->_build_message();
-		return $this->_spool_email();
+		$result = $this->_spool_email();
+
+		if ($result && $auto_clear)
+		{
+			$this->clear();
+		}
+
+		return $result;
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php
index 8ffd93a..6796092 100644
--- a/system/libraries/Encrypt.php
+++ b/system/libraries/Encrypt.php
@@ -484,7 +484,7 @@
 	 */
 	public function set_hash($type = 'sha1')
 	{
-		$this->_hash_type = ($type !== 'sha1' && $type !== 'md5') ? 'sha1' : $type;
+		$this->_hash_type = in_array($type, hash_algos()) ? $type : 'sha1';
 	}
 
 	// --------------------------------------------------------------------
@@ -497,7 +497,7 @@
 	 */
 	public function hash($str)
 	{
-		return ($this->_hash_type === 'sha1') ? sha1($str) : md5($str);
+		return hash($this->_hash_type, $str);
 	}
 
 }
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 484e306..b490a34 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -460,6 +460,12 @@
 				$this->_field_data[$field]['postdata'] = $validation_array[$field];
 			}
 
+			// Don't try to validate if we have no rules set
+			if (empty($row['rules']))
+			{
+				continue;
+			}
+
 			$this->_execute($row, explode('|', $row['rules']), $this->_field_data[$field]['postdata']);
 		}
 
@@ -1076,7 +1082,7 @@
 	 */
 	public function valid_email($str)
 	{
-		return (bool) preg_match('/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix', $str);
+		return (bool) filter_var($str, FILTER_VALIDATE_EMAIL);
 	}
 
 	// --------------------------------------------------------------------
@@ -1129,7 +1135,7 @@
 	 */
 	public function alpha($str)
 	{
-		return (bool) preg_match('/^[a-z]+$/i', $str);
+		return ctype_alpha($str);
 	}
 
 	// --------------------------------------------------------------------
@@ -1142,7 +1148,7 @@
 	 */
 	public function alpha_numeric($str)
 	{
-		return (bool) preg_match('/^[a-z0-9]+$/i', $str);
+		return ctype_alnum((string) $str);
 	}
 
 	// --------------------------------------------------------------------
@@ -1264,7 +1270,7 @@
 	 */
 	public function is_natural($str)
 	{
-		return (bool) preg_match('/^[0-9]+$/', $str);
+		return ctype_digit((string) $str);
 	}
 
 	// --------------------------------------------------------------------
@@ -1277,7 +1283,7 @@
 	 */
 	public function is_natural_no_zero($str)
 	{
-		return ($str && preg_match('/^[0-9]+$/', $str));
+		return ($str != 0 && ctype_digit((string) $str));
 	}
 
 	// --------------------------------------------------------------------
@@ -1360,7 +1366,7 @@
 	 */
 	public function strip_image_tags($str)
 	{
-		return $this->CI->input->strip_image_tags($str);
+		return $this->CI->security->strip_image_tags($str);
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/libraries/Ftp.php b/system/libraries/Ftp.php
index 461e884..76f5e15 100644
--- a/system/libraries/Ftp.php
+++ b/system/libraries/Ftp.php
@@ -445,7 +445,7 @@
 	 * Set file permissions
 	 *
 	 * @param	string	the file path
-	 * @param	string	the permissions
+	 * @param	int	the permissions
 	 * @return	bool
 	 */
 	public function chmod($path, $perm)
diff --git a/system/libraries/Image_lib.php b/system/libraries/Image_lib.php
index 4735dfd..ef41878 100644
--- a/system/libraries/Image_lib.php
+++ b/system/libraries/Image_lib.php
@@ -855,7 +855,14 @@
 		}
 		else // Resize
 		{
-			$cmd .= ' -resize '.$this->width.'x'.$this->height.' "'.$this->full_src_path.'" "'.$this->full_dst_path.'" 2>&1';
+			if($this->maintain_ratio === TRUE)
+			{
+				$cmd .= ' -resize '.$this->width.'x'.$this->height.' "'.$this->full_src_path.'" "'.$this->full_dst_path.'" 2>&1';
+			}
+			else
+			{
+				$cmd .= ' -resize '.$this->width.'x'.$this->height.'\! "'.$this->full_src_path.'" "'.$this->full_dst_path.'" 2>&1';
+			}
 		}
 
 		$retval = 1;
@@ -1313,6 +1320,13 @@
 				imagestring($src_img, $this->wm_font_size, $x_shad, $y_shad, $this->wm_text, $drp_color);
 				imagestring($src_img, $this->wm_font_size, $x_axis, $y_axis, $this->wm_text, $txt_color);
 			}
+
+			// We can preserve transparency for PNG images
+			if ($this->image_type === 3)
+			{
+				imagealphablending($src_img, FALSE);
+				imagesavealpha($src_img, TRUE);
+			}
 		}
 
 		// Output the final image
diff --git a/system/libraries/Migration.php b/system/libraries/Migration.php
index 3a1e7a0..5d637d4 100644
--- a/system/libraries/Migration.php
+++ b/system/libraries/Migration.php
@@ -285,14 +285,14 @@
 		if ( ! $migrations = $this->find_migrations())
 		{
 			$this->_error_string = $this->lang->line('migration_none_found');
-			return false;
+			return FALSE;
 		}
 
 		$last_migration = basename(end($migrations));
 
 		// Calculate the last migration step from existing migration
 		// filenames and procceed to the standard version migration
-		return $this->version((int) substr($last_migration, 0, 3));
+		return $this->version((int) $last_migration);
 	}
 
 	// --------------------------------------------------------------------
@@ -322,9 +322,9 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Set's the schema to the latest migration
+	 * Retrieves list of available migration scripts
 	 *
-	 * @return	mixed	true if already latest, false if failed, int if upgraded
+	 * @return	array	list of migration file paths sorted by version
 	 */
 	protected function find_migrations()
 	{
diff --git a/system/libraries/Pagination.php b/system/libraries/Pagination.php
index 75745dd..e1e729b 100644
--- a/system/libraries/Pagination.php
+++ b/system/libraries/Pagination.php
@@ -52,24 +52,25 @@
 	protected $full_tag_open		= '';
 	protected $full_tag_close		= '';
 	protected $first_tag_open		= '';
-	protected $first_tag_close		= '&nbsp;';
-	protected $last_tag_open		= '&nbsp;';
+	protected $first_tag_close		= '';
+	protected $last_tag_open		= '';
 	protected $last_tag_close		= '';
 	protected $first_url			= ''; // Alternative URL for the First Page.
-	protected $cur_tag_open			= '&nbsp;<strong>';
+	protected $cur_tag_open			= '<strong>';
 	protected $cur_tag_close		= '</strong>';
-	protected $next_tag_open		= '&nbsp;';
-	protected $next_tag_close		= '&nbsp;';
-	protected $prev_tag_open		= '&nbsp;';
+	protected $next_tag_open		= '';
+	protected $next_tag_close		= '';
+	protected $prev_tag_open		= '';
 	protected $prev_tag_close		= '';
-	protected $num_tag_open			= '&nbsp;';
+	protected $num_tag_open			= '';
 	protected $num_tag_close		= '';
 	protected $page_query_string	= FALSE;
-	protected $query_string_segment 	= 'per_page';
+	protected $query_string_segment = 'per_page';
 	protected $display_pages		= TRUE;
 	protected $_attributes			= '';
 	protected $_link_types			= array();
 	protected $reuse_query_string   = FALSE;
+	protected $data_page_attr		= 'data-ci-pagination-page';
 
 	/**
 	 * Constructor
@@ -202,7 +203,7 @@
 
 		if ( ! $this->use_page_numbers)
 		{
-			$this->cur_page = floor(($this->cur_page/$this->per_page) + 1);
+			$this->cur_page = (int) floor(($this->cur_page/$this->per_page) + 1);
 		}
 
 		// Calculate the start and end numbers. These determine
@@ -214,7 +215,8 @@
 		// string. If post, add a trailing slash to the base URL if needed
 		if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)
 		{
-			$this->base_url = rtrim($this->base_url).'&amp;'.$this->query_string_segment.'=';
+			$segment = (strpos($this->base_url, '?')) ? '&amp;' : '?';
+			$this->base_url = rtrim($this->base_url).$segment.$this->query_string_segment.'=';
 		}
 		else
 		{
@@ -230,10 +232,12 @@
 		if ($this->reuse_query_string === TRUE)
 		{
 			$get = $CI->input->get();
-			
+
 			// Unset the controll, method, old-school routing options
 			unset($get['c'], $get['m'], $get[$this->query_string_segment]);
 
+			if ( ! $get) $get = array();
+
 			// Put everything else onto the end
 			$query_string = (strpos($this->base_url, '&amp;') !== FALSE ? '&amp;' : '?') . http_build_query($get, '', '&amp;');
 
@@ -245,7 +249,11 @@
 		if ($this->first_link !== FALSE && $this->cur_page > ($this->num_links + 1))
 		{
 			$first_url = ($this->first_url === '') ? $this->base_url : $this->first_url;
-			$output .= $this->first_tag_open.'<a href="'.$first_url.'"'.$this->_attributes.$this->_attr_rel('start').'>'
+
+			// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
+			$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, 1);
+
+			$output .= $this->first_tag_open.'<a href="'.$first_url.'"'.$attributes.$this->_attr_rel('start').'>'
 				.$this->first_link.'</a>'.$this->first_tag_close;
 		}
 
@@ -254,15 +262,18 @@
 		{
 			$i = ($this->use_page_numbers) ? $uri_page_number - 1 : $uri_page_number - $this->per_page;
 
+			// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
+			$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);
+
 			if ($i === $base_page && $this->first_url !== '')
 			{
-				$output .= $this->prev_tag_open.'<a href="'.$this->first_url.$query_string.'"'.$this->_attributes.$this->_attr_rel('prev').'>'
+				$output .= $this->prev_tag_open.'<a href="'.$this->first_url.$query_string.'"'.$attributes.$this->_attr_rel('prev').'>'
 					.$this->prev_link.'</a>'.$this->prev_tag_close;
 			}
 			else
 			{
 				$append = ($i === $base_page) ? $query_string : $this->prefix.$i.$this->suffix;
-				$output .= $this->prev_tag_open.'<a href="'.$this->base_url.$append.'"'.$this->_attributes.$this->_attr_rel('prev').'>'
+				$output .= $this->prev_tag_open.'<a href="'.$this->base_url.$append.'"'.$attributes.$this->_attr_rel('prev').'>'
 					.$this->prev_link.'</a>'.$this->prev_tag_close;
 			}
 
@@ -275,6 +286,10 @@
 			for ($loop = $start -1; $loop <= $end; $loop++)
 			{
 				$i = ($this->use_page_numbers) ? $loop : ($loop * $this->per_page) - $this->per_page;
+
+				// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
+				$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);
+
 				if ($i >= $base_page)
 				{
 					if ($this->cur_page === $loop)
@@ -286,13 +301,13 @@
 						$n = ($i === $base_page) ? '' : $i;
 						if ($n === '' && ! empty($this->first_url))
 						{
-							$output .= $this->num_tag_open.'<a href="'.$this->first_url.$query_string.'"'.$this->_attributes.$this->_attr_rel('start').'>'
+							$output .= $this->num_tag_open.'<a href="'.$this->first_url.$query_string.'"'.$attributes.$this->_attr_rel('start').'>'
 								.$loop.'</a>'.$this->num_tag_close;
 						}
 						else
 						{
 							$append = ($n === '') ? $query_string : $this->prefix.$n.$this->suffix;
-							$output .= $this->num_tag_open.'<a href="'.$this->base_url.$append.'"'.$this->_attributes.$this->_attr_rel('start').'>'
+							$output .= $this->num_tag_open.'<a href="'.$this->base_url.$append.'"'.$attributes.$this->_attr_rel('start').'>'
 								.$loop.'</a>'.$this->num_tag_close;
 						}
 					}
@@ -305,7 +320,10 @@
 		{
 			$i = ($this->use_page_numbers) ? $this->cur_page + 1 : $this->cur_page * $this->per_page;
 
-			$output .= $this->next_tag_open.'<a href="'.$this->base_url.$this->prefix.$i.$this->suffix.'"'.$this->_attributes
+			// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
+			$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);
+
+			$output .= $this->next_tag_open.'<a href="'.$this->base_url.$this->prefix.$i.$this->suffix.'"'.$attributes
 				.$this->_attr_rel('next').'>'.$this->next_link.'</a>'.$this->next_tag_close;
 		}
 
@@ -314,7 +332,10 @@
 		{
 			$i = ($this->use_page_numbers) ? $num_pages : ($num_pages * $this->per_page) - $this->per_page;
 
-			$output .= $this->last_tag_open.'<a href="'.$this->base_url.$this->prefix.$i.$this->suffix.'"'.$this->_attributes.'>'
+			// Take the general parameters, and squeeze this pagination-page attr in there for JS fw's
+			$attributes = sprintf('%s %s="%d"', $this->_attributes, $this->data_page_attr, (int) $i);
+
+			$output .= $this->last_tag_open.'<a href="'.$this->base_url.$this->prefix.$i.$this->suffix.'"'.$attributes.'>'
 				.$this->last_link.'</a>'.$this->last_tag_close;
 		}
 
diff --git a/system/libraries/Session.php b/system/libraries/Session.php
deleted file mode 100644
index 72a942b..0000000
--- a/system/libraries/Session.php
+++ /dev/null
@@ -1,958 +0,0 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-/**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.2.4 or newer
- *
- * NOTICE OF LICENSE
- *
- * Licensed under the Open Software License version 3.0
- *
- * This source file is subject to the Open Software License (OSL 3.0) that is
- * bundled with this package in the files license.txt / license.rst.  It is
- * also available through the world wide web at this URL:
- * http://opensource.org/licenses/OSL-3.0
- * If you did not receive a copy of the license and are unable to obtain it
- * through the world wide web, please send an email to
- * licensing@ellislab.com so we can send you a copy immediately.
- *
- * @package		CodeIgniter
- * @author		EllisLab Dev Team
- * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
- * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
- * @link		http://codeigniter.com
- * @since		Version 1.0
- * @filesource
- */
-
-/**
- * Session Class
- *
- * @package		CodeIgniter
- * @subpackage	Libraries
- * @category	Sessions
- * @author		EllisLab Dev Team
- * @link		http://codeigniter.com/user_guide/libraries/sessions.html
- */
-class CI_Session {
-
-	/**
-	 * Whether to encrypt the session cookie
-	 *
-	 * @var bool
-	 */
-	public $sess_encrypt_cookie		= FALSE;
-
-	/**
-	 * Whether to use to the database for session storage
-	 *
-	 * @var bool
-	 */
-	public $sess_use_database		= FALSE;
-
-	/**
-	 * Name of the database table in which to store sessions
-	 *
-	 * @var string
-	 */
-	public $sess_table_name			= '';
-
-	/**
-	 * Length of time (in seconds) for sessions to expire
-	 *
-	 * @var int
-	 */
-	public $sess_expiration			= 7200;
-
-	/**
-	 * Whether to kill session on close of browser window
-	 *
-	 * @var bool
-	 */
-	public $sess_expire_on_close		= FALSE;
-
-	/**
-	 * Whether to match session on ip address
-	 *
-	 * @var bool
-	 */
-	public $sess_match_ip			= FALSE;
-
-	/**
-	 * Whether to match session on user-agent
-	 *
-	 * @var bool
-	 */
-	public $sess_match_useragent		= TRUE;
-
-	/**
-	 * Name of session cookie
-	 *
-	 * @var string
-	 */
-	public $sess_cookie_name		= 'ci_session';
-
-	/**
-	 * Session cookie prefix
-	 *
-	 * @var string
-	 */
-	public $cookie_prefix			= '';
-
-	/**
-	 * Session cookie path
-	 *
-	 * @var string
-	 */
-	public $cookie_path			= '';
-
-	/**
-	 * Session cookie domain
-	 *
-	 * @var string
-	 */
-	public $cookie_domain			= '';
-
-	/**
-	 * Whether to set the cookie only on HTTPS connections
-	 *
-	 * @var bool
-	 */
-	public $cookie_secure			= FALSE;
-
-	/**
-	 * Whether cookie should be allowed only to be sent by the server
-	 *
-	 * @var bool
-	 */
-	public $cookie_httponly 		= FALSE;
-
-	/**
-	 * Interval at which to update session
-	 *
-	 * @var int
-	 */
-	public $sess_time_to_update		= 300;
-
-	/**
-	 * Key with which to encrypt the session cookie
-	 *
-	 * @var string
-	 */
-	public $encryption_key			= '';
-
-	/**
-	 * String to indicate flash data cookies
-	 *
-	 * @var string
-	 */
-	public $flashdata_key			= 'flash';
-
-	/**
-	 * Timezone to use for the current time
-	 *
-	 * @var string
-	 */
-	public $time_reference			= 'local';
-
-	/**
-	 * Probablity level of garbage collection of old sessions
-	 *
-	 * @var int
-	 */
-	public $gc_probability			= 5;
-
-	/**
-	 * Session data
-	 *
-	 * @var array
-	 */
-	public $userdata			= array();
-
-	/**
-	 * Reference to CodeIgniter instance
-	 *
-	 * @var object
-	 */
-	public $CI;
-
-	/**
-	 * Current time
-	 *
-	 * @var int
-	 */
-	public $now;
-
-	/**
-	 * Session Constructor
-	 *
-	 * The constructor runs the session routines automatically
-	 * whenever the class is instantiated.
-	 *
-	 * @param	array
-	 * @return	void
-	 */
-	public function __construct($params = array())
-	{
-		log_message('debug', 'Session Class Initialized');
-
-		// Set the super object to a local variable for use throughout the class
-		$this->CI =& get_instance();
-
-		// Set all the session preferences, which can either be set
-		// manually via the $params array above or via the config file
-		foreach (array('sess_encrypt_cookie', 'sess_use_database', 'sess_table_name', 'sess_expiration', 'sess_expire_on_close', 'sess_match_ip', 'sess_match_useragent', 'sess_cookie_name', 'cookie_path', 'cookie_domain', 'cookie_secure', 'cookie_httponly', 'sess_time_to_update', 'time_reference', 'cookie_prefix', 'encryption_key') as $key)
-		{
-			$this->$key = isset($params[$key]) ? $params[$key] : $this->CI->config->item($key);
-		}
-
-		if ($this->encryption_key === '')
-		{
-			show_error('In order to use the Session class you are required to set an encryption key in your config file.');
-		}
-
-		// Load the string helper so we can use the strip_slashes() function
-		$this->CI->load->helper('string');
-
-		// Do we need encryption? If so, load the encryption class
-		if ($this->sess_encrypt_cookie === TRUE)
-		{
-			$this->CI->load->library('encrypt');
-		}
-
-		// Are we using a database? If so, load it
-		if ($this->sess_use_database === TRUE && $this->sess_table_name !== '')
-		{
-			$this->CI->load->database();
-		}
-
-		// Set the "now" time. Can either be GMT or server time, based on the
-		// config prefs. We use this to set the "last activity" time
-		$this->now = $this->_get_time();
-
-		// Set the session length. If the session expiration is
-		// set to zero we'll set the expiration two years from now.
-		if ($this->sess_expiration === 0)
-		{
-			$this->sess_expiration = (60*60*24*365*2);
-		}
-
-		// Set the cookie name
-		$this->sess_cookie_name = $this->cookie_prefix.$this->sess_cookie_name;
-
-		// Run the Session routine. If a session doesn't exist we'll
-		// create a new one. If it does, we'll update it.
-		if ( ! $this->sess_read())
-		{
-			$this->sess_create();
-		}
-		else
-		{
-			$this->sess_update();
-		}
-
-		// Delete 'old' flashdata (from last request)
-		$this->_flashdata_sweep();
-
-		// Mark all new flashdata as old (data will be deleted before next request)
-		$this->_flashdata_mark();
-
-		// Delete expired sessions if necessary
-		$this->_sess_gc();
-
-		log_message('debug', 'Session routines successfully run');
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Fetch the current session data if it exists
-	 *
-	 * @return	bool
-	 */
-	public function sess_read()
-	{
-		// Fetch the cookie
-		$session = $this->CI->input->cookie($this->sess_cookie_name);
-
-		// No cookie?  Goodbye cruel world!...
-		if ($session === NULL)
-		{
-			log_message('debug', 'A session cookie was not found.');
-			return FALSE;
-		}
-
-		// Decrypt the cookie data
-		if ($this->sess_encrypt_cookie === TRUE)
-		{
-			$session = $this->CI->encrypt->decode($session);
-		}
-		else
-		{
-			// encryption was not used, so we need to check the md5 hash
-			$hash	 = substr($session, strlen($session)-32); // get last 32 chars
-			$session = substr($session, 0, strlen($session)-32);
-
-			// Does the md5 hash match? This is to prevent manipulation of session data in userspace
-			if ($hash !==  md5($session.$this->encryption_key))
-			{
-				log_message('error', 'The session cookie data did not match what was expected. This could be a possible hacking attempt.');
-				$this->sess_destroy();
-				return FALSE;
-			}
-		}
-
-		// Unserialize the session array
-		$session = $this->_unserialize($session);
-
-		// Is the session data we unserialized an array with the correct format?
-		if ( ! is_array($session) OR ! isset($session['session_id'], $session['ip_address'], $session['user_agent'], $session['last_activity']))
-		{
-			$this->sess_destroy();
-			return FALSE;
-		}
-
-		// Is the session current?
-		if (($session['last_activity'] + $this->sess_expiration) < $this->now)
-		{
-			$this->sess_destroy();
-			return FALSE;
-		}
-
-		// Does the IP match?
-		if ($this->sess_match_ip === TRUE && $session['ip_address'] !== $this->CI->input->ip_address())
-		{
-			$this->sess_destroy();
-			return FALSE;
-		}
-
-		// Does the User Agent Match?
-		if ($this->sess_match_useragent === TRUE && trim($session['user_agent']) !== trim(substr($this->CI->input->user_agent(), 0, 120)))
-		{
-			$this->sess_destroy();
-			return FALSE;
-		}
-
-		// Is there a corresponding session in the DB?
-		if ($this->sess_use_database === TRUE)
-		{
-			$this->CI->db->where('session_id', $session['session_id']);
-
-			if ($this->sess_match_ip === TRUE)
-			{
-				$this->CI->db->where('ip_address', $session['ip_address']);
-			}
-
-			if ($this->sess_match_useragent === TRUE)
-			{
-				$this->CI->db->where('user_agent', $session['user_agent']);
-			}
-
-			$query = $this->CI->db->limit(1)->get($this->sess_table_name);
-
-			// No result? Kill it!
-			if ($query->num_rows() === 0)
-			{
-				$this->sess_destroy();
-				return FALSE;
-			}
-
-			// Is there custom data?  If so, add it to the main session array
-			$row = $query->row();
-			if ( ! empty($row->user_data))
-			{
-				$custom_data = $this->_unserialize($row->user_data);
-
-				if (is_array($custom_data))
-				{
-					foreach ($custom_data as $key => $val)
-					{
-						$session[$key] = $val;
-					}
-				}
-			}
-		}
-
-		// Session is valid!
-		$this->userdata = $session;
-		unset($session);
-
-		return TRUE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Write the session data
-	 *
-	 * @return	void
-	 */
-	public function sess_write()
-	{
-		// Are we saving custom data to the DB?  If not, all we do is update the cookie
-		if ($this->sess_use_database === FALSE)
-		{
-			$this->_set_cookie();
-			return;
-		}
-
-		// set the custom userdata, the session data we will set in a second
-		$custom_userdata = $this->userdata;
-		$cookie_userdata = array();
-
-		// Before continuing, we need to determine if there is any custom data to deal with.
-		// Let's determine this by removing the default indexes to see if there's anything left in the array
-		// and set the session data while we're at it
-		foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
-		{
-			unset($custom_userdata[$val]);
-			$cookie_userdata[$val] = $this->userdata[$val];
-		}
-
-		// Did we find any custom data? If not, we turn the empty array into a string
-		// since there's no reason to serialize and store an empty array in the DB
-		if (count($custom_userdata) === 0)
-		{
-			$custom_userdata = '';
-		}
-		else
-		{
-			// Serialize the custom data array so we can store it
-			$custom_userdata = $this->_serialize($custom_userdata);
-		}
-
-		// Run the update query
-		$this->CI->db->where('session_id', $this->userdata['session_id']);
-		$this->CI->db->update($this->sess_table_name, array('last_activity' => $this->userdata['last_activity'], 'user_data' => $custom_userdata));
-
-		// Write the cookie. Notice that we manually pass the cookie data array to the
-		// _set_cookie() function. Normally that function will store $this->userdata, but
-		// in this case that array contains custom data, which we do not want in the cookie.
-		$this->_set_cookie($cookie_userdata);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Create a new session
-	 *
-	 * @return	void
-	 */
-	public function sess_create()
-	{
-		$sessid = '';
-		do
-		{
-			$sessid .= mt_rand(0, mt_getrandmax());
-		}
-		while (strlen($sessid) < 32);
-
-		// To make the session ID even more secure we'll combine it with the user's IP
-		$sessid .= $this->CI->input->ip_address();
-
-		$this->userdata = array(
-					'session_id'	=> md5(uniqid($sessid, TRUE)),
-					'ip_address'	=> $this->CI->input->ip_address(),
-					'user_agent'	=> substr($this->CI->input->user_agent(), 0, 120),
-					'last_activity'	=> $this->now,
-					'user_data'	=> ''
-				);
-
-		// Save the data to the DB if needed
-		if ($this->sess_use_database === TRUE)
-		{
-			$this->CI->db->query($this->CI->db->insert_string($this->sess_table_name, $this->userdata));
-		}
-
-		// Write the cookie
-		$this->_set_cookie();
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Update an existing session
-	 *
-	 * @return	void
-	 */
-	public function sess_update()
-	{
-		// We only update the session every five minutes by default
-		if (($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)
-		{
-			return;
-		}
-
-		// _set_cookie() will handle this for us if we aren't using database sessions
-		// by pushing all userdata to the cookie.
-		$cookie_data = NULL;
-
-		/* Changing the session ID during an AJAX call causes problems,
-		 * so we'll only update our last_activity
-		 */
-		if ($this->CI->input->is_ajax_request())
-		{
-			$this->userdata['last_activity'] = $this->now;
-
-			// Update the session ID and last_activity field in the DB if needed
-			if ($this->sess_use_database === TRUE)
-			{
-				// set cookie explicitly to only have our session data
-				$cookie_data = array();
-				foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
-				{
-					$cookie_data[$val] = $this->userdata[$val];
-				}
-
-				$this->CI->db->query($this->CI->db->update_string($this->sess_table_name,
-											array('last_activity' => $this->userdata['last_activity']),
-											array('session_id' => $this->userdata['session_id'])));
-			}
-
-			return $this->_set_cookie($cookie_data);
-		}
-
-		// Save the old session id so we know which record to
-		// update in the database if we need it
-		$old_sessid = $this->userdata['session_id'];
-		$new_sessid = '';
-		do
-		{
-			$new_sessid .= mt_rand(0, mt_getrandmax());
-		}
-		while (strlen($new_sessid) < 32);
-
-		// To make the session ID even more secure we'll combine it with the user's IP
-		$new_sessid .= $this->CI->input->ip_address();
-
-		// Turn it into a hash and update the session data array
-		$this->userdata['session_id'] = $new_sessid = md5(uniqid($new_sessid, TRUE));
-		$this->userdata['last_activity'] = $this->now;
-
-		// Update the session ID and last_activity field in the DB if needed
-		if ($this->sess_use_database === TRUE)
-		{
-			// set cookie explicitly to only have our session data
-			$cookie_data = array();
-			foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
-			{
-				$cookie_data[$val] = $this->userdata[$val];
-			}
-
-			$this->CI->db->query($this->CI->db->update_string($this->sess_table_name, array('last_activity' => $this->now, 'session_id' => $new_sessid), array('session_id' => $old_sessid)));
-		}
-
-		// Write the cookie
-		$this->_set_cookie($cookie_data);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Destroy the current session
-	 *
-	 * @return	void
-	 */
-	public function sess_destroy()
-	{
-		// Kill the session DB row
-		if ($this->sess_use_database === TRUE && isset($this->userdata['session_id']))
-		{
-			$this->CI->db->where('session_id', $this->userdata['session_id']);
-			$this->CI->db->delete($this->sess_table_name);
-		}
-
-		// Kill the cookie
-		setcookie(
-				$this->sess_cookie_name,
-				addslashes(serialize(array())),
-				($this->now - 31500000),
-				$this->cookie_path,
-				$this->cookie_domain,
-				0
-			);
-
-		// Kill session data
-		$this->userdata = array();
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Fetch a specific item from the session array
-	 *
-	 * @param	string
-	 * @return	string
-	 */
-	public function userdata($item)
-	{
-		return isset($this->userdata[$item]) ? $this->userdata[$item] : NULL;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Fetch all session data
-	 *
-	 * @return	array
-	 */
-	public function all_userdata()
-	{
-		return $this->userdata;
-	}
-
-	// --------------------------------------------------------------------------
-
-	/**
-	 * Fetch all flashdata
-	 *
-	 * @return	array
-	 */
-	public function all_flashdata()
-	{
-		$out = array();
-
-		// loop through all userdata
-		foreach ($this->all_userdata() as $key => $val)
-		{
-			// if it contains flashdata, add it
-			if (strpos($key, 'flash:old:') !== FALSE)
-			{
-				$out[$key] = $val;
-			}
-		}
-		return $out;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Add or change data in the "userdata" array
-	 *
-	 * @param	mixed
-	 * @param	string
-	 * @return	void
-	 */
-	public function set_userdata($newdata = array(), $newval = '')
-	{
-		if (is_string($newdata))
-		{
-			$newdata = array($newdata => $newval);
-		}
-
-		if (count($newdata) > 0)
-		{
-			foreach ($newdata as $key => $val)
-			{
-				$this->userdata[$key] = $val;
-			}
-		}
-
-		$this->sess_write();
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete a session variable from the "userdata" array
-	 *
-	 * @param	array
-	 * @return	void
-	 */
-	public function unset_userdata($newdata = array())
-	{
-		if (is_string($newdata))
-		{
-			$newdata = array($newdata => '');
-		}
-
-		if (count($newdata) > 0)
-		{
-			foreach ($newdata as $key => $val)
-			{
-				unset($this->userdata[$key]);
-			}
-		}
-
-		$this->sess_write();
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Add or change flashdata, only available
-	 * until the next request
-	 *
-	 * @param	mixed
-	 * @param	string
-	 * @return	void
-	 */
-	public function set_flashdata($newdata = array(), $newval = '')
-	{
-		if (is_string($newdata))
-		{
-			$newdata = array($newdata => $newval);
-		}
-
-		if (count($newdata) > 0)
-		{
-			foreach ($newdata as $key => $val)
-			{
-				$this->set_userdata($this->flashdata_key.':new:'.$key, $val);
-			}
-		}
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Keeps existing flashdata available to next request.
-	 *
-	 * @param	string
-	 * @return	void
-	 */
-	public function keep_flashdata($key)
-	{
-		// 'old' flashdata gets removed. Here we mark all
-		// flashdata as 'new' to preserve it from _flashdata_sweep()
-		// Note the function will return NULL if the $key
-		// provided cannot be found
-		$value = $this->userdata($this->flashdata_key.':old:'.$key);
-
-		$this->set_userdata($this->flashdata_key.':new:'.$key, $value);
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Fetch a specific flashdata item from the session array
-	 *
-	 * @param	string
-	 * @return	string
-	 */
-	public function flashdata($key)
-	{
-		return $this->userdata($this->flashdata_key.':old:'.$key);
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Identifies flashdata as 'old' for removal
-	 * when _flashdata_sweep() runs.
-	 *
-	 * @return	void
-	 */
-	protected function _flashdata_mark()
-	{
-		$userdata = $this->all_userdata();
-		foreach ($userdata as $name => $value)
-		{
-			$parts = explode(':new:', $name);
-			if (is_array($parts) && count($parts) === 2)
-			{
-				$this->set_userdata($this->flashdata_key.':old:'.$parts[1], $value);
-				$this->unset_userdata($name);
-			}
-		}
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Removes all flashdata marked as 'old'
-	 *
-	 * @return	void
-	 */
-	protected function _flashdata_sweep()
-	{
-		$userdata = $this->all_userdata();
-		foreach ($userdata as $key => $value)
-		{
-			if (strpos($key, ':old:'))
-			{
-				$this->unset_userdata($key);
-			}
-		}
-
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Get the "now" time
-	 *
-	 * @return	string
-	 */
-	protected function _get_time()
-	{
-		if ($this->time_reference === 'local' OR $this->time_reference === date_default_timezone_get())
-		{
-			return time();
-		}
-
-		$datetime = new DateTime('now', new DateTimeZone($this->time_reference));
-		sscanf($datetime->format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second);
-
-		return mktime($hour, $minute, $second, $month, $day, $year);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Write the session cookie
-	 *
-	 * @param	mixed
-	 * @return	void
-	 */
-	protected function _set_cookie($cookie_data = NULL)
-	{
-		if (is_null($cookie_data))
-		{
-			$cookie_data = $this->userdata;
-		}
-
-		// Serialize the userdata for the cookie
-		$cookie_data = $this->_serialize($cookie_data);
-
-		if ($this->sess_encrypt_cookie === TRUE)
-		{
-			$cookie_data = $this->CI->encrypt->encode($cookie_data);
-		}
-		else
-		{
-			// if encryption is not used, we provide an md5 hash to prevent userside tampering
-			$cookie_data = $cookie_data.md5($cookie_data.$this->encryption_key);
-		}
-
-		$expire = ($this->sess_expire_on_close === TRUE) ? 0 : $this->sess_expiration + time();
-
-		// Set the cookie
-		setcookie(
-			$this->sess_cookie_name,
-			$cookie_data,
-			$expire,
-			$this->cookie_path,
-			$this->cookie_domain,
-			$this->cookie_secure,
-			$this->cookie_httponly
-		);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Serialize an array
-	 *
-	 * This function first converts any slashes found in the array to a temporary
-	 * marker, so when it gets unserialized the slashes will be preserved
-	 *
-	 * @param	array
-	 * @return	string
-	 */
-	protected function _serialize($data)
-	{
-		if (is_array($data))
-		{
-			array_walk_recursive($data, array(&$this, '_escape_slashes'));
-		}
-		elseif (is_string($data))
-		{
-			$data = str_replace('\\', '{{slash}}', $data);
-		}
-		return serialize($data);
-	}
-
-	/**
-	 * Escape slashes
-	 *
-	 * This function converts any slashes found into a temporary marker
-	 *
-	 * @param	string
-	 * @param	string
-	 * @return	void
-	 */
-	protected function _escape_slashes(&$val, $key)
-	{
-		if (is_string($val))
-		{
-			$val = str_replace('\\', '{{slash}}', $val);
-		}
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Unserialize
-	 *
-	 * This function unserializes a data string, then converts any
-	 * temporary slash markers back to actual slashes
-	 *
-	 * @param	array
-	 * @return	string
-	 */
-	protected function _unserialize($data)
-	{
-		$data = @unserialize(strip_slashes(trim($data)));
-
-		if (is_array($data))
-		{
-			array_walk_recursive($data, array(&$this, '_unescape_slashes'));
-			return $data;
-		}
-
-		return is_string($data) ? str_replace('{{slash}}', '\\', $data) : $data;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Unescape slashes
-	 *
-	 * This function converts any slash markers back into actual slashes
-	 *
-	 * @param	string
-	 * @param	string
-	 * @return	void
-	 */
-	protected function _unescape_slashes(&$val, $key)
-	{
-		if (is_string($val))
-		{
-	 		$val= str_replace('{{slash}}', '\\', $val);
-		}
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Garbage collection
-	 *
-	 * This deletes expired session rows from database
-	 * if the probability percentage is met
-	 *
-	 * @return	void
-	 */
-	protected function _sess_gc()
-	{
-		if ($this->sess_use_database !== TRUE)
-		{
-			return;
-		}
-
-		srand(time());
-		if ((rand() % 100) < $this->gc_probability)
-		{
-			$expire = $this->now - $this->sess_expiration;
-
-			$this->CI->db->where('last_activity < '.$expire);
-			$this->CI->db->delete($this->sess_table_name);
-
-			log_message('debug', 'Session garbage collection performed.');
-		}
-	}
-
-}
-
-/* End of file Session.php */
-/* Location: ./system/libraries/Session.php */
\ No newline at end of file
diff --git a/system/libraries/Session/Session.php b/system/libraries/Session/Session.php
new file mode 100755
index 0000000..e6f6050
--- /dev/null
+++ b/system/libraries/Session/Session.php
@@ -0,0 +1,689 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2006 - 2012 EllisLab, Inc.
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 2.0
+ * @filesource
+ */
+
+/**
+ * CodeIgniter Session Class
+ *
+ * The user interface defined by EllisLabs, now with puggable drivers to manage different storage mechanisms.
+ * By default, the cookie session driver will load, but the 'sess_driver' config/param item (see above) can be
+ * used to specify the 'native' driver, or any other you might create.
+ * Once loaded, this driver setup is a drop-in replacement for the former CI_Session library, taking its place as the
+ * 'session' member of the global controller framework (e.g.: $CI->session or $this->session).
+ * In keeping with the CI_Driver methodology, multiple drivers may be loaded, although this might be a bit confusing.
+ * The CI_Session library class keeps track of the most recently loaded driver as "current" to call for driver methods.
+ * Ideally, one driver is loaded and all calls go directly through the main library interface. However, any methods
+ * called through the specific driver will switch the "current" driver to itself before invoking the library method
+ * (which will then call back into the driver for low-level operations). So, alternation between two drivers can be
+ * achieved by specifying which driver to use for each call (e.g.: $this->session->native->set_userdata('foo', 'bar');
+ * $this->session->cookie->userdata('foo'); $this->session->native->unset_userdata('foo');). Notice in the previous
+ * example that the _native_ userdata value 'foo' would be set to 'bar', which would NOT be returned by the call for
+ * the _cookie_ userdata 'foo', nor would the _cookie_ value be unset by the call to unset the _native_ 'foo' value.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Sessions
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/sessions.html
+ */
+class CI_Session extends CI_Driver_Library {
+
+	public $params = array();
+	protected $current = NULL;
+	protected $userdata = array();
+
+	const FLASHDATA_KEY = 'flash';
+	const FLASHDATA_NEW = ':new:';
+	const FLASHDATA_OLD = ':old:';
+	const FLASHDATA_EXP = ':exp:';
+	const EXPIRATION_KEY = '__expirations';
+	const TEMP_EXP_DEF = 300;
+
+	/**
+	 * CI_Session constructor
+	 *
+	 * The constructor loads the configured driver ('sess_driver' in config.php or as a parameter), running
+	 * routines in its constructor, and manages flashdata aging.
+	 *
+	 * @param	array	Configuration parameters
+	 */
+	public function __construct(array $params = array())
+	{
+		log_message('debug', 'CI_Session Class Initialized');
+
+		// Get valid drivers list
+		$CI =& get_instance();
+		$this->valid_drivers = array(
+			'Session_native',
+		   	'Session_cookie'
+		);
+		$key = 'sess_valid_drivers';
+		$drivers = isset($params[$key]) ? $params[$key] : $CI->config->item($key);
+		if ($drivers)
+		{
+			is_array($drivers) OR $drivers = array($drivers);
+
+			// Add driver names to valid list
+			foreach ($drivers as $driver)
+			{
+				if ( ! in_array(strtolower($driver), array_map('strtolower', $this->valid_drivers)))
+				{
+					$this->valid_drivers[] = $driver;
+				}
+			}
+		}
+
+		// Get driver to load
+		$key = 'sess_driver';
+		$driver = isset($params[$key]) ? $params[$key] : $CI->config->item($key);
+		if ( ! $driver)
+		{
+			$driver = 'cookie';
+		}
+
+		if ( ! in_array('session_'.strtolower($driver), array_map('strtolower', $this->valid_drivers)))
+		{
+			$this->valid_drivers[] = 'Session_'.$driver;
+		}
+
+		// Save a copy of parameters in case drivers need access
+		$this->params = $params;
+
+		// Load driver and get array reference
+		$this->load_driver($driver);
+
+		// Delete 'old' flashdata (from last request)
+		$this->_flashdata_sweep();
+
+		// Mark all new flashdata as old (data will be deleted before next request)
+		$this->_flashdata_mark();
+
+		// Delete expired tempdata
+		$this->_tempdata_sweep();
+
+		log_message('debug', 'CI_Session routines successfully run');
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Loads session storage driver
+	 *
+	 * @param	string	Driver classname
+	 * @return	object	Loaded driver object
+	 */
+	public function load_driver($driver)
+	{
+		// Save reference to most recently loaded driver as library default and sync userdata
+		$this->current = parent::load_driver($driver);
+		$this->userdata =& $this->current->get_userdata();
+		return $this->current;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Select default session storage driver
+	 *
+	 * @param	string	Driver classname
+	 * @return	void
+	 */
+	public function select_driver($driver)
+	{
+		// Validate driver name
+		$lowername = strtolower(str_replace('CI_', '', $driver));
+		if (in_array($lowername, array_map('strtolower', $this->valid_drivers)))
+		{
+			// See if driver is loaded
+			$child = str_replace($this->lib_name.'_', '', $driver);
+			if (isset($this->$child))
+			{
+				// See if driver is already current
+				if ($this->$child !== $this->current)
+				{
+					// Make driver current and sync userdata
+					$this->current = $this->$child;
+					$this->userdata =& $this->current->get_userdata();
+				}
+			}
+			else
+			{
+				// Load new driver
+				$this->load_driver($child);
+			}
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Destroy the current session
+	 *
+	 * @return	void
+	 */
+	public function sess_destroy()
+	{
+		// Just call destroy on driver
+		$this->current->sess_destroy();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Regenerate the current session
+	 *
+	 * @param	bool	Destroy session data flag (default: false)
+	 * @return	void
+	 */
+	public function sess_regenerate($destroy = FALSE)
+	{
+		// Call regenerate on driver and resync userdata
+		$this->current->sess_regenerate($destroy);
+		$this->userdata =& $this->current->get_userdata();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Fetch a specific item from the session array
+	 *
+	 * @param	string	Item key
+	 * @return	string	Item value or NULL if not found
+	 */
+	public function userdata($item)
+	{
+		return isset($this->userdata[$item]) ? $this->userdata[$item] : NULL;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Fetch all session data
+	 *
+	 * @return	array	User data array
+	 */
+	public function all_userdata()
+	{
+		return isset($this->userdata) ? $this->userdata : NULL;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Fetch all flashdata
+	 *
+	 * @return	array   Flash data array
+	 */
+	public function all_flashdata()
+	{
+		$out = array();
+
+		// loop through all userdata
+		foreach ($this->all_userdata() as $key => $val)
+		{
+			// if it contains flashdata, add it
+			if (strpos($key, self::FLASHDATA_KEY.self::FLASHDATA_OLD) !== FALSE)
+			{
+				$key = str_replace(self::FLASHDATA_KEY.self::FLASHDATA_OLD, '', $key);
+				$out[$key] = $val;
+			}
+		}
+		return $out;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Add or change data in the "userdata" array
+	 *
+	 * @param	mixed	Item name or array of items
+	 * @param	string	Item value or empty string
+	 * @return	void
+	 */
+	public function set_userdata($newdata = array(), $newval = '')
+	{
+		// Wrap params as array if singular
+		if (is_string($newdata))
+		{
+			$newdata = array($newdata => $newval);
+		}
+
+		// Set each name/value pair
+		if (count($newdata) > 0)
+		{
+			foreach ($newdata as $key => $val)
+			{
+				$this->userdata[$key] = $val;
+			}
+		}
+
+		// Tell driver data changed
+		$this->current->sess_save();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Delete a session variable from the "userdata" array
+	 *
+	 * @param	mixed	Item name or array of item names
+	 * @return	void
+	 */
+	public function unset_userdata($newdata = array())
+	{
+		// Wrap single name as array
+		if (is_string($newdata))
+		{
+			$newdata = array($newdata => '');
+		}
+
+		// Unset each item name
+		if (count($newdata) > 0)
+		{
+			foreach (array_keys($newdata) as $key)
+			{
+				unset($this->userdata[$key]);
+			}
+		}
+
+		// Tell driver data changed
+		$this->current->sess_save();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Determine if an item exists
+	 *
+	 * @param	string	Item name
+	 * @return	bool
+	 */
+	public function has_userdata($item)
+	{
+		return isset($this->userdata[$item]);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Add or change flashdata, only available until the next request
+	 *
+	 * @param	mixed	Item name or array of items
+	 * @param	string	Item value or empty string
+	 * @return	void
+	 */
+	public function set_flashdata($newdata = array(), $newval = '')
+	{
+		// Wrap item as array if singular
+		if (is_string($newdata))
+		{
+			$newdata = array($newdata => $newval);
+		}
+
+		// Prepend each key name and set value
+		if (count($newdata) > 0)
+		{
+			foreach ($newdata as $key => $val)
+			{
+				$flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_NEW.$key;
+				$this->set_userdata($flashdata_key, $val);
+			}
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Keeps existing flashdata available to next request.
+	 *
+	 * @param	string	Item key
+	 * @return	void
+	 */
+	public function keep_flashdata($key)
+	{
+		// 'old' flashdata gets removed. Here we mark all flashdata as 'new' to preserve it from _flashdata_sweep()
+		// Note the function will return NULL if the $key provided cannot be found
+		$old_flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_OLD.$key;
+		$value = $this->userdata($old_flashdata_key);
+
+		$new_flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_NEW.$key;
+		$this->set_userdata($new_flashdata_key, $value);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Fetch a specific flashdata item from the session array
+	 *
+	 * @param	string	Item key
+	 * @return	string
+	 */
+	public function flashdata($key)
+	{
+		// Prepend key and retrieve value
+		$flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_OLD.$key;
+		return $this->userdata($flashdata_key);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Add or change tempdata, only available until expiration
+	 *
+	 * @param	mixed	Item name or array of items
+	 * @param	string	Item value or empty string
+	 * @param	int	Item lifetime in seconds or 0 for default
+	 * @return	void
+	 */
+	public function set_tempdata($newdata = array(), $newval = '', $expire = 0)
+	{
+		// Set expiration time
+		$expire = time() + ($expire ? $expire : self::TEMP_EXP_DEF);
+
+		// Wrap item as array if singular
+		if (is_string($newdata))
+		{
+			$newdata = array($newdata => $newval);
+		}
+
+		// Get or create expiration list
+		$expirations = $this->userdata(self::EXPIRATION_KEY);
+		if ( ! $expirations)
+		{
+			$expirations = array();
+		}
+
+		// Prepend each key name and set value
+		if (count($newdata) > 0)
+		{
+			foreach ($newdata as $key => $val)
+			{
+				$tempdata_key = self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key;
+				$expirations[$tempdata_key] = $expire;
+				$this->set_userdata($tempdata_key, $val);
+			}
+		}
+
+		// Update expiration list
+		$this->set_userdata(self::EXPIRATION_KEY, $expirations);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Delete a temporary session variable from the "userdata" array
+	 *
+	 * @param	mixed	Item name or array of item names
+	 * @return	void
+	 */
+	public function unset_tempdata($newdata = array())
+	{
+		// Get expirations list
+		$expirations = $this->userdata(self::EXPIRATION_KEY);
+		if (empty($expirations))
+		{
+			// Nothing to do
+			return;
+		}
+
+		// Wrap single name as array
+		if (is_string($newdata))
+		{
+			$newdata = array($newdata => '');
+		}
+
+		// Prepend each item name and unset
+		if (count($newdata) > 0)
+		{
+			foreach (array_keys($newdata) as $key)
+			{
+				$tempdata_key = self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key;
+				unset($expirations[$tempdata_key]);
+				$this->unset_userdata($tempdata_key);
+			}
+		}
+
+		// Update expiration list
+		$this->set_userdata(self::EXPIRATION_KEY, $expirations);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Fetch a specific tempdata item from the session array
+	 *
+	 * @param	string	Item key
+	 * @return	string
+	 */
+	public function tempdata($key)
+	{
+		// Prepend key and return value
+		$tempdata_key = self::FLASHDATA_KEY.self::FLASHDATA_EXP.$key;
+		return $this->userdata($tempdata_key);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Identifies flashdata as 'old' for removal
+	 * when _flashdata_sweep() runs.
+	 *
+	 * @return	void
+	 */
+	protected function _flashdata_mark()
+	{
+		foreach ($this->all_userdata() as $name => $value)
+		{
+			$parts = explode(self::FLASHDATA_NEW, $name);
+			if (is_array($parts) && count($parts) === 2)
+			{
+				$new_name = self::FLASHDATA_KEY.self::FLASHDATA_OLD.$parts[1];
+				$this->set_userdata($new_name, $value);
+				$this->unset_userdata($name);
+			}
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Removes all flashdata marked as 'old'
+	 *
+	 * @return	void
+	 */
+	protected function _flashdata_sweep()
+	{
+		$userdata = $this->all_userdata();
+		foreach (array_keys($userdata) as $key)
+		{
+			if (strpos($key, self::FLASHDATA_OLD))
+			{
+				$this->unset_userdata($key);
+			}
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Removes all expired tempdata
+	 *
+	 * @return	void
+	 */
+	protected function _tempdata_sweep()
+	{
+		// Get expirations list
+		$expirations = $this->userdata(self::EXPIRATION_KEY);
+		if (empty($expirations))
+		{
+			// Nothing to do
+			return;
+		}
+
+		// Unset expired elements
+		$now = time();
+		$userdata = $this->all_userdata();
+		foreach (array_keys($userdata) as $key)
+		{
+			if (strpos($key, self::FLASHDATA_EXP) && $expirations[$key] < $now)
+			{
+				unset($expirations[$key]);
+				$this->unset_userdata($key);
+			}
+		}
+
+		// Update expiration list
+		$this->set_userdata(self::EXPIRATION_KEY, $expirations);
+	}
+
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * CI_Session_driver Class
+ *
+ * Extend this class to make a new CI_Session driver.
+ * A CI_Session driver basically manages an array of name/value pairs with some sort of storage mechanism.
+ * To make a new driver, derive from (extend) CI_Session_driver. Overload the initialize method and read or create
+ * session data. Then implement a save handler to write changed data to storage (sess_save), a destroy handler
+ * to remove deleted data (sess_destroy), and an access handler to expose the data (get_userdata).
+ * Put your driver in the libraries/Session/drivers folder anywhere in the loader paths. This includes the
+ * application directory, the system directory, or any path you add with $CI->load->add_package_path().
+ * Your driver must be named CI_Session_<name>, and your filename must be Session_<name>.php,
+ * preferably also capitalized. (e.g.: CI_Session_foo in libraries/Session/drivers/Session_foo.php)
+ * Then specify the driver by setting 'sess_driver' in your config file or as a parameter when loading the CI_Session
+ * object. (e.g.: $config['sess_driver'] = 'foo'; OR $CI->load->driver('session', array('sess_driver' => 'foo')); )
+ * Already provided are the Native driver, which manages the native PHP $_SESSION array, and
+ * the Cookie driver, which manages the data in a browser cookie, with optional extra storage in a database table.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Sessions
+ * @author		EllisLab Dev Team
+ */
+abstract class CI_Session_driver extends CI_Driver {
+
+	/**
+	 * Decorate
+	 *
+	 * Decorates the child with the parent driver lib's methods and properties
+	 *
+	 * @param	object	Parent library object
+	 * @return	void
+	 */
+	public function decorate($parent)
+	{
+		// Call base class decorate first
+		parent::decorate($parent);
+
+		// Call initialize method now that driver has access to $this->_parent
+		$this->initialize();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * __call magic method
+	 *
+	 * Handles access to the parent driver library's methods
+	 *
+	 * @param	string	Library method name
+	 * @param	array	Method arguments (default: none)
+	 * @return	mixed
+	 */
+	public function __call($method, $args = array())
+	{
+		// Make sure the parent library uses this driver
+		$this->_parent->select_driver(get_class($this));
+		return parent::__call($method, $args);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Initialize driver
+	 *
+	 * @return	void
+	 */
+	protected function initialize()
+	{
+		// Overload this method to implement initialization
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Save the session data
+	 *
+	 * Data in the array has changed - perform any storage synchronization
+	 * necessary. The child class MUST implement this abstract method!
+	 *
+	 * @return	void
+	 */
+	abstract public function sess_save();
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Destroy the current session
+	 *
+	 * Clean up storage for this session - it has been terminated.
+	 * The child class MUST implement this abstract method!
+	 *
+	 * @return	void
+	 */
+	abstract public function sess_destroy();
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Regenerate the current session
+	 *
+	 * Regenerate the session ID.
+	 * The child class MUST implement this abstract method!
+	 *
+	 * @param	bool	Destroy session data flag (default: false)
+	 * @return	void
+	 */
+	abstract public function sess_regenerate($destroy = FALSE);
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Get a reference to user data array
+	 *
+	 * Give array access to the main CI_Session object.
+	 * The child class MUST implement this abstract method!
+	 *
+	 * @return	array	Reference to userdata
+	 */
+	abstract public function &get_userdata();
+
+}
+
+/* End of file Session.php */
+/* Location: ./system/libraries/Session/Session.php */
\ No newline at end of file
diff --git a/system/libraries/Session/drivers/Session_cookie.php b/system/libraries/Session/drivers/Session_cookie.php
new file mode 100755
index 0000000..4f415cc
--- /dev/null
+++ b/system/libraries/Session/drivers/Session_cookie.php
@@ -0,0 +1,824 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst. It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+/**
+ * Cookie-based session management driver
+ *
+ * This is the classic CI_Session functionality, as written by EllisLab, abstracted out to a driver.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Sessions
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/sessions.html
+ */
+class CI_Session_cookie extends CI_Session_driver {
+
+	/**
+	 * Whether to encrypt the session cookie
+	 *
+	 * @var bool
+	 */
+	public $sess_encrypt_cookie		= FALSE;
+
+	/**
+	 * Whether to use to the database for session storage
+	 *
+	 * @var bool
+	 */
+	public $sess_use_database		= FALSE;
+
+	/**
+	 * Name of the database table in which to store sessions
+	 *
+	 * @var string
+	 */
+	public $sess_table_name			= '';
+
+	/**
+	 * Length of time (in seconds) for sessions to expire
+	 *
+	 * @var int
+	 */
+	public $sess_expiration			= 7200;
+
+	/**
+	 * Whether to kill session on close of browser window
+	 *
+	 * @var bool
+	 */
+	public $sess_expire_on_close	= FALSE;
+
+	/**
+	 * Whether to match session on ip address
+	 *
+	 * @var bool
+	 */
+	public $sess_match_ip			= FALSE;
+
+	/**
+	 * Whether to match session on user-agent
+	 *
+	 * @var bool
+	 */
+	public $sess_match_useragent	= TRUE;
+
+	/**
+	 * Name of session cookie
+	 *
+	 * @var string
+	 */
+	public $sess_cookie_name		= 'ci_session';
+
+	/**
+	 * Session cookie prefix
+	 *
+	 * @var string
+	 */
+	public $cookie_prefix			= '';
+
+	/**
+	 * Session cookie path
+	 *
+	 * @var string
+	 */
+	public $cookie_path				= '';
+
+	/**
+	 * Session cookie domain
+	 *
+	 * @var string
+	 */
+	public $cookie_domain			= '';
+
+	/**
+	 * Whether to set the cookie only on HTTPS connections
+	 *
+	 * @var bool
+	 */
+	public $cookie_secure			= FALSE;
+
+	/**
+	 * Whether cookie should be allowed only to be sent by the server
+	 *
+	 * @var bool
+	 */
+	public $cookie_httponly 		= FALSE;
+
+	/**
+	 * Interval at which to update session
+	 *
+	 * @var int
+	 */
+	public $sess_time_to_update		= 300;
+
+	/**
+	 * Key with which to encrypt the session cookie
+	 *
+	 * @var string
+	 */
+	public $encryption_key			= '';
+
+	/**
+	 * Timezone to use for the current time
+	 *
+	 * @var string
+	 */
+	public $time_reference			= 'local';
+
+	/**
+	 * Session data
+	 *
+	 * @var array
+	 */
+	public $userdata				= array();
+
+	/**
+	 * Reference to CodeIgniter instance
+	 *
+	 * @var object
+	 */
+	public $CI;
+
+	/**
+	 * Current time
+	 *
+	 * @var int
+	 */
+	public $now;
+
+	/**
+	 * Default userdata keys
+	 *
+	 * @var	array
+	 */
+	protected $defaults = array(
+		'session_id' => NULL,
+		'ip_address' => NULL,
+		'user_agent' => NULL,
+		'last_activity' => NULL
+	);
+
+	/**
+	 * Data needs DB update flag
+	 *
+	 * @var	bool
+	 */
+	protected $data_dirty = FALSE;
+
+	/**
+	 * Initialize session driver object
+	 *
+	 * @return	void
+	 */
+	protected function initialize()
+	{
+		// Set the super object to a local variable for use throughout the class
+		$this->CI =& get_instance();
+
+		// Set all the session preferences, which can either be set
+		// manually via the $params array or via the config file
+		$prefs = array(
+			'sess_encrypt_cookie',
+			'sess_use_database',
+			'sess_table_name',
+			'sess_expiration',
+			'sess_expire_on_close',
+			'sess_match_ip',
+			'sess_match_useragent',
+			'sess_cookie_name',
+			'cookie_path',
+			'cookie_domain',
+			'cookie_secure',
+			'cookie_httponly',
+			'sess_time_to_update',
+			'time_reference',
+			'cookie_prefix',
+			'encryption_key'
+		);
+
+		foreach ($prefs as $key)
+		{
+			$this->$key = isset($this->_parent->params[$key])
+				? $this->_parent->params[$key]
+				: $this->CI->config->item($key);
+		}
+
+		if ($this->encryption_key === '')
+		{
+			show_error('In order to use the Cookie Session driver you are required to set an encryption key in your config file.');
+		}
+
+		// Load the string helper so we can use the strip_slashes() function
+		$this->CI->load->helper('string');
+
+		// Do we need encryption? If so, load the encryption class
+		if ($this->sess_encrypt_cookie === TRUE)
+		{
+			$this->CI->load->library('encrypt');
+		}
+
+		// Check for database
+		if ($this->sess_use_database === TRUE && $this->sess_table_name !== '')
+		{
+			// Load database driver
+			$this->CI->load->database();
+
+			// Register shutdown function
+			register_shutdown_function(array($this, '_update_db'));
+		}
+
+		// Set the "now" time. Can either be GMT or server time, based on the config prefs.
+		// We use this to set the "last activity" time
+		$this->now = $this->_get_time();
+
+		// Set the session length. If the session expiration is
+		// set to zero we'll set the expiration two years from now.
+		if ($this->sess_expiration === 0)
+		{
+			$this->sess_expiration = (60*60*24*365*2);
+		}
+
+		// Set the cookie name
+		$this->sess_cookie_name = $this->cookie_prefix.$this->sess_cookie_name;
+
+		// Run the Session routine. If a session doesn't exist we'll
+		// create a new one. If it does, we'll update it.
+		if ( ! $this->_sess_read())
+		{
+			$this->_sess_create();
+		}
+		else
+		{
+			$this->_sess_update();
+		}
+
+		// Delete expired sessions if necessary
+		$this->_sess_gc();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Write the session data
+	 *
+	 * @return	void
+	 */
+	public function sess_save()
+	{
+		// Check for database
+		if ($this->sess_use_database === TRUE)
+		{
+			// Mark custom data as dirty so we know to update the DB
+			$this->data_dirty = TRUE;
+		}
+
+		// Write the cookie
+		$this->_set_cookie();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Destroy the current session
+	 *
+	 * @return	void
+	 */
+	public function sess_destroy()
+	{
+		// Kill the session DB row
+		if ($this->sess_use_database === TRUE && isset($this->userdata['session_id']))
+		{
+			$this->CI->db->delete($this->sess_table_name, array('session_id' => $this->userdata['session_id']));
+			$this->data_dirty = FALSE;
+		}
+
+		// Kill the cookie
+		$this->_setcookie($this->sess_cookie_name, addslashes(serialize(array())), ($this->now - 31500000),
+			$this->cookie_path, $this->cookie_domain, 0);
+
+		// Kill session data
+		$this->userdata = array();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Regenerate the current session
+	 *
+	 * Regenerate the session id
+	 *
+	 * @param	bool	Destroy session data flag (default: false)
+	 * @return	void
+	 */
+	public function sess_regenerate($destroy = FALSE)
+	{
+		// Check destroy flag
+		if ($destroy)
+		{
+			// Destroy old session and create new one
+			$this->sess_destroy();
+			$this->_sess_create();
+		}
+		else
+		{
+			// Just force an update to recreate the id
+			$this->_sess_update(TRUE);
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Get a reference to user data array
+	 *
+	 * @return	array	Reference to userdata
+	 */
+	public function &get_userdata()
+	{
+		return $this->userdata;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Fetch the current session data if it exists
+	 *
+	 * @return	bool
+	 */
+	protected function _sess_read()
+	{
+		// Fetch the cookie
+		$session = $this->CI->input->cookie($this->sess_cookie_name);
+
+		// No cookie? Goodbye cruel world!...
+		if ($session === NULL)
+		{
+			log_message('debug', 'A session cookie was not found.');
+			return FALSE;
+		}
+
+		// Check for encryption
+		if ($this->sess_encrypt_cookie === TRUE)
+		{
+			// Decrypt the cookie data
+			$session = $this->CI->encrypt->decode($session);
+		}
+		else
+		{
+			// Encryption was not used, so we need to check the md5 hash in the last 32 chars
+			$len	 = strlen($session)-32;
+			$hash	 = substr($session, $len);
+			$session = substr($session, 0, $len);
+
+			// Does the md5 hash match? This is to prevent manipulation of session data in userspace
+			if ($hash !== md5($session.$this->encryption_key))
+			{
+				log_message('error', 'The session cookie data did not match what was expected. This could be a possible hacking attempt.');
+				$this->sess_destroy();
+				return FALSE;
+			}
+		}
+
+		// Unserialize the session array
+		$session = $this->_unserialize($session);
+
+		// Is the session data we unserialized an array with the correct format?
+		if ( ! is_array($session) OR ! isset($session['session_id'], $session['ip_address'], $session['user_agent'], $session['last_activity']))
+		{
+			$this->sess_destroy();
+			return FALSE;
+		}
+
+		// Is the session current?
+		if (($session['last_activity'] + $this->sess_expiration) < $this->now)
+		{
+			$this->sess_destroy();
+			return FALSE;
+		}
+
+		// Does the IP match?
+		if ($this->sess_match_ip === TRUE && $session['ip_address'] !== $this->CI->input->ip_address())
+		{
+			$this->sess_destroy();
+			return FALSE;
+		}
+
+		// Does the User Agent Match?
+		if ($this->sess_match_useragent === TRUE &&
+			trim($session['user_agent']) !== trim(substr($this->CI->input->user_agent(), 0, 120)))
+		{
+			$this->sess_destroy();
+			return FALSE;
+		}
+
+		// Is there a corresponding session in the DB?
+		if ($this->sess_use_database === TRUE)
+		{
+			$this->CI->db->where('session_id', $session['session_id']);
+
+			if ($this->sess_match_ip === TRUE)
+			{
+				$this->CI->db->where('ip_address', $session['ip_address']);
+			}
+
+			if ($this->sess_match_useragent === TRUE)
+			{
+				$this->CI->db->where('user_agent', $session['user_agent']);
+			}
+
+			// Is caching in effect? Turn it off
+			$db_cache = $this->CI->db->cache_on;
+			$this->CI->db->cache_off();
+
+			$query = $this->CI->db->limit(1)->get($this->sess_table_name);
+
+			// Was caching in effect?
+			if ($db_cache)
+			{
+				// Turn it back on
+				$this->CI->db->cache_on();
+			}
+
+			// No result? Kill it!
+			if ($query->num_rows() === 0)
+			{
+				$this->sess_destroy();
+				return FALSE;
+			}
+
+			// Is there custom data? If so, add it to the main session array
+			$row = $query->row();
+			if ( ! empty($row->user_data))
+			{
+				$custom_data = $this->_unserialize($row->user_data);
+
+				if (is_array($custom_data))
+				{
+					$session = $session + $custom_data;
+				}
+			}
+		}
+
+		// Session is valid!
+		$this->userdata = $session;
+		return TRUE;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Create a new session
+	 *
+	 * @return	void
+	 */
+	protected function _sess_create()
+	{
+		// Initialize userdata
+		$this->userdata = array(
+			'session_id'	=> $this->_make_sess_id(),
+			'ip_address'	=> $this->CI->input->ip_address(),
+			'user_agent'	=> substr($this->CI->input->user_agent(), 0, 120),
+			'last_activity'	=> $this->now,
+		);
+
+		// Check for database
+		if ($this->sess_use_database === TRUE)
+		{
+			// Add empty user_data field and save the data to the DB
+			$this->CI->db->set('user_data', '')->insert($this->sess_table_name, $this->userdata);
+		}
+
+		// Write the cookie
+		$this->_set_cookie();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Update an existing session
+	 *
+	 * @param	bool	Force update flag (default: false)
+	 * @return	void
+	 */
+	protected function _sess_update($force = FALSE)
+	{
+		// We only update the session every five minutes by default (unless forced)
+		if ( ! $force && ($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)
+		{
+			return;
+		}
+
+		// Update last activity to now
+		$this->userdata['last_activity'] = $this->now;
+
+		// Save the old session id so we know which DB record to update
+		$old_sessid = $this->userdata['session_id'];
+
+		// Changing the session ID during an AJAX call causes problems
+		if ( ! $this->CI->input->is_ajax_request())
+		{
+			// Get new id
+			$this->userdata['session_id'] = $this->_make_sess_id();
+		}
+
+		// Check for database
+		if ($this->sess_use_database === TRUE)
+		{
+			// Update the session ID and last_activity field in the DB
+			$this->CI->db->update($this->sess_table_name, array(
+					 'last_activity' => $this->now,
+					 'session_id' => $this->userdata['session_id']
+			), array('session_id' => $old_sessid));
+		}
+
+		// Write the cookie
+		$this->_set_cookie();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Update database with current data
+	 *
+	 * This gets called from the shutdown function and also
+	 * registered with PHP to run at the end of the request
+	 * so it's guaranteed to update even when a fatal error
+	 * occurs. The first call makes the update and clears the
+	 * dirty flag so it won't happen twice.
+	 *
+	 * @return	void
+	 */
+	public function _update_db()
+	{
+		// Check for database and dirty flag and unsaved
+		if ($this->sess_use_database === TRUE && $this->data_dirty === TRUE)
+		{
+			// Set up activity and data fields to be set
+			// If we don't find custom data, user_data will remain an empty string
+			$set = array(
+				'last_activity' => $this->userdata['last_activity'],
+				'user_data' => ''
+			);
+
+			// Get the custom userdata, leaving out the defaults
+			// (which get stored in the cookie)
+			$userdata = array_diff_key($this->userdata, $this->defaults);
+
+			// Did we find any custom data?
+			if ( ! empty($userdata))
+			{
+				// Serialize the custom data array so we can store it
+				$set['user_data'] = $this->_serialize($userdata);
+			}
+
+			// Run the update query
+			// Any time we change the session id, it gets updated immediately,
+			// so our where clause below is always safe
+			$this->CI->db->update($this->sess_table_name, $set, array('session_id' => $this->userdata['session_id']));
+
+			// Clear dirty flag to prevent double updates
+			$this->data_dirty = FALSE;
+
+			log_message('debug', 'CI_Session Data Saved To DB');
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Generate a new session id
+	 *
+	 * @return	string	Hashed session id
+	 */
+	protected function _make_sess_id()
+	{
+		$new_sessid = '';
+		do
+		{
+			$new_sessid .= mt_rand(0, mt_getrandmax());
+		}
+		while (strlen($new_sessid) < 32);
+
+		// To make the session ID even more secure we'll combine it with the user's IP
+		$new_sessid .= $this->CI->input->ip_address();
+
+		// Turn it into a hash and return
+		return md5(uniqid($new_sessid, TRUE));
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Get the "now" time
+	 *
+	 * @return	int	 Time
+	 */
+	protected function _get_time()
+	{
+		if ($this->time_reference === 'local' OR $this->time_reference === date_default_timezone_get())
+		{
+			return time();
+		}
+
+		$datetime = new DateTime('now', new DateTimeZone($this->time_reference));
+		sscanf($datetime->format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second);
+
+		return mktime($hour, $minute, $second, $month, $day, $year);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Write the session cookie
+	 *
+	 * @return	void
+	 */
+	protected function _set_cookie()
+	{
+		// Get userdata (only defaults if database)
+		$cookie_data = ($this->sess_use_database === TRUE)
+				? array_intersect_key($this->userdata, $this->defaults)
+				: $this->userdata;
+
+		// Serialize the userdata for the cookie
+		$cookie_data = $this->_serialize($cookie_data);
+
+		$cookie_data = ($this->sess_encrypt_cookie === TRUE)
+			? $this->CI->encrypt->encode($cookie_data)
+			// if encryption is not used, we provide an md5 hash to prevent userside tampering
+			: $cookie_data.md5($cookie_data.$this->encryption_key);
+
+		$expire = ($this->sess_expire_on_close === TRUE) ? 0 : $this->sess_expiration + time();
+
+		// Set the cookie
+		$this->_setcookie($this->sess_cookie_name, $cookie_data, $expire, $this->cookie_path, $this->cookie_domain,
+			$this->cookie_secure, $this->cookie_httponly);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Set a cookie with the system
+	 *
+	 * This abstraction of the setcookie call allows overriding for unit testing
+	 *
+	 * @param	string	Cookie name
+	 * @param	string	Cookie value
+	 * @param	int	Expiration time
+	 * @param	string	Cookie path
+	 * @param	string	Cookie domain
+	 * @param	bool	Secure connection flag
+	 * @param	bool	HTTP protocol only flag
+	 * @return	void
+	 */
+	protected function _setcookie($name, $value = '', $expire = 0, $path = '', $domain = '', $secure = FALSE, $httponly = FALSE)
+	{
+		setcookie($name, $value, $expire, $path, $domain, $secure, $httponly);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Serialize an array
+	 *
+	 * This function first converts any slashes found in the array to a temporary
+	 * marker, so when it gets unserialized the slashes will be preserved
+	 *
+	 * @param	mixed	Data to serialize
+	 * @return	string	Serialized data
+	 */
+	protected function _serialize($data)
+	{
+		if (is_array($data))
+		{
+			array_walk_recursive($data, array(&$this, '_escape_slashes'));
+		}
+		elseif (is_string($data))
+		{
+			$data = str_replace('\\', '{{slash}}', $data);
+		}
+
+		return serialize($data);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Escape slashes
+	 *
+	 * This function converts any slashes found into a temporary marker
+	 *
+	 * @param	string	Value
+	 * @param	string	Key
+	 * @return	void
+	 */
+	protected function _escape_slashes(&$val, $key)
+	{
+		if (is_string($val))
+		{
+			$val = str_replace('\\', '{{slash}}', $val);
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Unserialize
+	 *
+	 * This function unserializes a data string, then converts any
+	 * temporary slash markers back to actual slashes
+	 *
+	 * @param	mixed	Data to unserialize
+	 * @return	mixed	Unserialized data
+	 */
+	protected function _unserialize($data)
+	{
+		$data = @unserialize(strip_slashes(trim($data)));
+
+		if (is_array($data))
+		{
+			array_walk_recursive($data, array(&$this, '_unescape_slashes'));
+			return $data;
+		}
+
+		return is_string($data) ? str_replace('{{slash}}', '\\', $data) : $data;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Unescape slashes
+	 *
+	 * This function converts any slash markers back into actual slashes
+	 *
+	 * @param	string	Value
+	 * @param	string	Key
+	 * @return	void
+	 */
+	protected function _unescape_slashes(&$val, $key)
+	{
+		if (is_string($val))
+		{
+	 		$val= str_replace('{{slash}}', '\\', $val);
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Garbage collection
+	 *
+	 * This deletes expired session rows from database
+	 * if the probability percentage is met
+	 *
+	 * @return	void
+	 */
+	protected function _sess_gc()
+	{
+		if ($this->sess_use_database !== TRUE)
+		{
+			return;
+		}
+
+		$probability = ini_get('session.gc_probability');
+		$divisor = ini_get('session.gc_divisor');
+
+		srand(time());
+		if ((mt_rand(0, $divisor) / $divisor) < $probability)
+		{
+			$expire = $this->now - $this->sess_expiration;
+			$this->CI->db->delete($this->sess_table_name, 'last_activity < '.$expire);
+
+			log_message('debug', 'Session garbage collection performed.');
+		}
+	}
+
+}
+
+/* End of file Session_cookie.php */
+/* Location: ./system/libraries/Session/drivers/Session_cookie.php */
\ No newline at end of file
diff --git a/system/libraries/Session/drivers/Session_native.php b/system/libraries/Session/drivers/Session_native.php
new file mode 100755
index 0000000..c97e153
--- /dev/null
+++ b/system/libraries/Session/drivers/Session_native.php
@@ -0,0 +1,232 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst. It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+/**
+ * Native PHP session management driver
+ *
+ * This is the driver that uses the native PHP $_SESSION array through the Session driver library.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Sessions
+ * @author		EllisLab Dev Team
+ */
+class CI_Session_native extends CI_Session_driver {
+
+	/**
+	 * Initialize session driver object
+	 *
+	 * @return	void
+	 */
+	protected function initialize()
+	{
+		// Get config parameters
+		$config = array();
+		$CI =& get_instance();
+		$prefs = array(
+			'sess_cookie_name',
+			'sess_expire_on_close',
+			'sess_expiration',
+			'sess_match_ip',
+			'sess_match_useragent',
+			'sess_time_to_update',
+			'cookie_prefix',
+			'cookie_path',
+			'cookie_domain'
+		);
+
+		foreach ($prefs as $key)
+		{
+			$config[$key] = isset($this->_parent->params[$key])
+				? $this->_parent->params[$key]
+				: $CI->config->item($key);
+		}
+
+		// Set session name, if specified
+		if ($config['sess_cookie_name'])
+		{
+			// Differentiate name from cookie driver with '_id' suffix
+			$name = $config['sess_cookie_name'].'_id';
+			if ($config['cookie_prefix'])
+			{
+				// Prepend cookie prefix
+				$name = $config['cookie_prefix'].$name;
+			}
+			session_name($name);
+		}
+
+		// Set expiration, path, and domain
+		$expire = 7200;
+		$path = '/';
+		$domain = '';
+		if ($config['sess_expiration'] !== FALSE)
+		{
+			// Default to 2 years if expiration is "0"
+			$expire = ($config['sess_expiration'] == 0) ? (60*60*24*365*2) : $config['sess_expiration'];
+		}
+
+		if ($config['cookie_path'])
+		{
+			// Use specified path
+			$path = $config['cookie_path'];
+		}
+
+		if ($config['cookie_domain'])
+		{
+			// Use specified domain
+			$domain = $config['cookie_domain'];
+		}
+		session_set_cookie_params($config['sess_expire_on_close'] ? 0 : $expire, $path, $domain);
+
+		// Start session
+		session_start();
+
+		// Check session expiration, ip, and agent
+		$now = time();
+		$destroy = FALSE;
+		if (isset($_SESSION['last_activity']) && ($_SESSION['last_activity'] + $expire) < $now)
+		{
+			// Expired - destroy
+			$destroy = TRUE;
+		}
+		elseif ($config['sess_match_ip'] === TRUE && isset($_SESSION['ip_address'])
+			&& $_SESSION['ip_address'] !== $CI->input->ip_address())
+		{
+			// IP doesn't match - destroy
+			$destroy = TRUE;
+		}
+		elseif ($config['sess_match_useragent'] === TRUE && isset($_SESSION['user_agent'])
+			&& $_SESSION['user_agent'] !== trim(substr($CI->input->user_agent(), 0, 50)))
+		{
+			// Agent doesn't match - destroy
+			$destroy = TRUE;
+		}
+
+		// Destroy expired or invalid session
+		if ($destroy)
+		{
+			// Clear old session and start new
+			$this->sess_destroy();
+			session_start();
+		}
+
+		// Check for update time
+		if ($config['sess_time_to_update'] && isset($_SESSION['last_activity'])
+			&& ($_SESSION['last_activity'] + $config['sess_time_to_update']) < $now)
+		{
+			// Regenerate ID, but don't destroy session
+			$this->sess_regenerate(FALSE);
+		}
+
+		// Set activity time
+		$_SESSION['last_activity'] = $now;
+
+		// Set matching values as required
+		if ($config['sess_match_ip'] === TRUE && ! isset($_SESSION['ip_address']))
+		{
+			// Store user IP address
+			$_SESSION['ip_address'] = $CI->input->ip_address();
+		}
+
+		if ($config['sess_match_useragent'] === TRUE && ! isset($_SESSION['user_agent']))
+		{
+			// Store user agent string
+			$_SESSION['user_agent'] = trim(substr($CI->input->user_agent(), 0, 50));
+		}
+
+		// Make session ID available
+		$_SESSION['session_id'] = session_id();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Save the session data
+	 *
+	 * @return	void
+	 */
+	public function sess_save()
+	{
+		// Nothing to do - changes to $_SESSION are automatically saved
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Destroy the current session
+	 *
+	 * @return	void
+	 */
+	public function sess_destroy()
+	{
+		// Cleanup session
+		$_SESSION = array();
+		$name = session_name();
+		if (isset($_COOKIE[$name]))
+		{
+			// Clear session cookie
+			$params = session_get_cookie_params();
+			setcookie($name, '', time() - 42000, $params['path'], $params['domain']);
+			unset($_COOKIE[$name]);
+		}
+		session_destroy();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Regenerate the current session
+	 *
+	 * Regenerate the session id
+	 *
+	 * @param	bool	Destroy session data flag (default: FALSE)
+	 * @return	void
+	 */
+	public function sess_regenerate($destroy = FALSE)
+	{
+		// Just regenerate id, passing destroy flag
+		session_regenerate_id($destroy);
+		$_SESSION['session_id'] = session_id();
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Get a reference to user data array
+	 *
+	 * @return	array	Reference to userdata
+	 */
+	public function &get_userdata()
+	{
+		// Just return reference to $_SESSION
+		return $_SESSION;
+	}
+
+}
+
+/* End of file Session_native.php */
+/* Location: ./system/libraries/Session/drivers/Session_native.php */
\ No newline at end of file
diff --git a/system/libraries/Unit_test.php b/system/libraries/Unit_test.php
index 70ad8dc..c2c0175 100644
--- a/system/libraries/Unit_test.php
+++ b/system/libraries/Unit_test.php
@@ -240,6 +240,11 @@
 				{
 					foreach ($val as $k => $v)
 					{
+						if ( ! in_array($k, $this->_test_items_visible))
+						{
+							continue;
+						}
+
 						if (FALSE !== ($line = $CI->lang->line(strtolower('ut_'.$v))))
 						{
 							$v = $line;
diff --git a/system/libraries/Xmlrpc.php b/system/libraries/Xmlrpc.php
old mode 100644
new mode 100755
index eac4ac1..dc5d27f
--- a/system/libraries/Xmlrpc.php
+++ b/system/libraries/Xmlrpc.php
@@ -174,7 +174,7 @@
 	 * @param	int	port
 	 * @return	void
 	 */
-	public function server($url, $port = 80)
+	public function server($url, $port = 80, $proxy = FALSE, $proxy_port = 8080)
 	{
 		if (strpos($url, 'http') !== 0)
 		{
@@ -190,7 +190,7 @@
 			$path .= '?'.$parts['query'];
 		}
 
-		$this->client = new XML_RPC_Client($path, $parts['host'], $port);
+		$this->client = new XML_RPC_Client($path, $parts['host'], $port, $proxy, $proxy_port);
 	}
 
 	// --------------------------------------------------------------------
@@ -385,6 +385,8 @@
 	public $path			= '';
 	public $server			= '';
 	public $port			= 80;
+	public $proxy			= FALSE;
+	public $proxy_port		= 8080;
 	public $errno			= '';
 	public $errstring		= '';
 	public $timeout		= 5;
@@ -398,13 +400,15 @@
 	 * @param	int
 	 * @return	void
 	 */
-	public function __construct($path, $server, $port = 80)
+	public function __construct($path, $server, $port = 80, $proxy = FALSE, $proxy_port = 8080)
 	{
 		parent::__construct();
 
 		$this->port = $port;
 		$this->server = $server;
 		$this->path = $path;
+		$this->proxy = $proxy;
+		$this->proxy_port = $proxy_port;
 	}
 
 	// --------------------------------------------------------------------
@@ -436,7 +440,18 @@
 	 */
 	public function sendPayload($msg)
 	{
-		$fp = @fsockopen($this->server, $this->port,$this->errno, $this->errstring, $this->timeout);
+		if ($this->proxy === FALSE)
+		{
+			$server = $this->server;
+			$port = $this->port;
+		}
+		else
+		{
+			$server = $this->proxy;
+			$port = $this->proxy_port;
+		}
+
+		$fp = @fsockopen($server, $port, $this->errno, $this->errstring, $this->timeout);
 
 		if ( ! is_resource($fp))
 		{
@@ -1302,15 +1317,15 @@
 		{
 			$type = $type === '' ? 'string' : $type;
 
-			if ($this->xmlrpcTypes[$type] === 1)
+			if ($this->xmlrpcTypes[$type] == 1)
 			{
 				$this->addScalar($val,$type);
 			}
-			elseif ($this->xmlrpcTypes[$type] === 2)
+			elseif ($this->xmlrpcTypes[$type] == 2)
 			{
 				$this->addArray($val);
 			}
-			elseif ($this->xmlrpcTypes[$type] === 3)
+			elseif ($this->xmlrpcTypes[$type] == 3)
 			{
 				$this->addStruct($val);
 			}
@@ -1336,7 +1351,7 @@
 			return 0;
 		}
 
-		if ($typeof !== 1)
+		if ($typeof != 1)
 		{
 			echo '<strong>XML_RPC_Values</strong>: not a scalar type (${typeof})<br />';
 			return 0;
@@ -1344,7 +1359,7 @@
 
 		if ($type === $this->xmlrpcBoolean)
 		{
-			$val = (int) (strcasecmp($val,'true') === 0 OR $val === 1 OR ($val === TRUE && strcasecmp($val, 'false')));
+			$val = (int) (strcasecmp($val, 'true') === 0 OR $val === 1 OR ($val === TRUE && strcasecmp($val, 'false')));
 		}
 
 		if ($this->mytype === 2)
diff --git a/system/libraries/Xmlrpcs.php b/system/libraries/Xmlrpcs.php
index e81f2ca..5d01d37 100644
--- a/system/libraries/Xmlrpcs.php
+++ b/system/libraries/Xmlrpcs.php
@@ -230,7 +230,7 @@
 						);
 
 		xml_set_object($parser, $parser_object);
-		xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, true);
+		xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, TRUE);
 		xml_set_element_handler($parser, 'open_tag', 'closing_tag');
 		xml_set_character_data_handler($parser, 'character_data');
 		//xml_set_default_handler($parser, 'default_handler');
diff --git a/tests/codeigniter/core/Common_test.php b/tests/codeigniter/core/Common_test.php
index f9bf6c2..27d48ef 100644
--- a/tests/codeigniter/core/Common_test.php
+++ b/tests/codeigniter/core/Common_test.php
@@ -10,4 +10,35 @@
 		$this->assertEquals(FALSE, is_php('9999.9.9'));
 	}
 
+	// ------------------------------------------------------------------------
+
+	public function test_stringify_attributes()
+	{
+		$this->assertEquals(' class="foo" id="bar"', _stringify_attributes(array('class' => 'foo', 'id' => 'bar')));
+
+		$atts = new Stdclass;
+		$atts->class = 'foo';
+		$atts->id = 'bar';
+		$this->assertEquals(' class="foo" id="bar"', _stringify_attributes($atts));
+
+		$atts = new Stdclass;
+		$this->assertEquals('', _stringify_attributes($atts));
+
+		$this->assertEquals(' class="foo" id="bar"', _stringify_attributes('class="foo" id="bar"'));
+
+		$this->assertEquals('', _stringify_attributes(array()));
+	}
+
+	// ------------------------------------------------------------------------
+
+	public function test_stringify_js_attributes()
+	{
+		$this->assertEquals('width=800,height=600', _stringify_attributes(array('width' => '800', 'height' => '600'), TRUE));
+
+		$atts = new Stdclass;
+		$atts->width = 800;
+		$atts->height = 600;
+		$this->assertEquals('width=800,height=600', _stringify_attributes($atts, TRUE));
+	}
+
 }
\ No newline at end of file
diff --git a/tests/codeigniter/database/query_builder/escape_test.php b/tests/codeigniter/database/query_builder/escape_test.php
index c6380dd..27e678f 100644
--- a/tests/codeigniter/database/query_builder/escape_test.php
+++ b/tests/codeigniter/database/query_builder/escape_test.php
@@ -27,7 +27,7 @@
 
 		if (strpos(DB_DRIVER, 'mysql') !== FALSE)
 		{
-			$sql = "SELECT `value` FROM `misc` WHERE `key` LIKE '$string%' ESCAPE '';";
+			$sql = "SELECT `value` FROM `misc` WHERE `key` LIKE '$string%' ESCAPE '!';";
 		}
 		else
 		{
@@ -52,7 +52,7 @@
 
 		if (strpos(DB_DRIVER, 'mysql') !== FALSE)
 		{
-			$sql = "SELECT `value` FROM `misc` WHERE `key` LIKE '$string%' ESCAPE '';";
+			$sql = "SELECT `value` FROM `misc` WHERE `key` LIKE '$string%' ESCAPE '!';";
 		}
 		else
 		{
diff --git a/tests/codeigniter/database/query_builder/join_test.php b/tests/codeigniter/database/query_builder/join_test.php
index b8cf2a8..25bd4ac 100644
--- a/tests/codeigniter/database/query_builder/join_test.php
+++ b/tests/codeigniter/database/query_builder/join_test.php
@@ -35,4 +35,24 @@
 		$this->assertEquals('Developer', $job_user[0]['job_name']);
 	}
 
+	// ------------------------------------------------------------------------
+
+	public function test_join_escape_multiple_conditions()
+	{
+		// We just need a valid query produced, not one that makes sense
+		$fields = array($this->db->protect_identifiers('table1.field1'), $this->db->protect_identifiers('table2.field2'));
+
+		$expected = 'SELECT '.implode(', ', $fields)
+				."\nFROM ".$this->db->escape_identifiers('table1')
+				."\nLEFT JOIN ".$this->db->escape_identifiers('table2').' ON '.implode(' = ', $fields)
+				.' AND '.$fields[0]." = 'foo' AND ".$fields[1].' = 0';
+
+		$result = $this->db->select('table1.field1, table2.field2')
+				->from('table1')
+				->join('table2', "table1.field1 = table2.field2 AND table1.field1 = 'foo' AND table2.field2 = 0", 'LEFT')
+				->get_compiled_select();
+
+		$this->assertEquals($expected, $result);
+	}
+
 }
\ No newline at end of file
diff --git a/tests/codeigniter/helpers/date_helper_test.php b/tests/codeigniter/helpers/date_helper_test.php
index 4e01b1a..1b79b94 100644
--- a/tests/codeigniter/helpers/date_helper_test.php
+++ b/tests/codeigniter/helpers/date_helper_test.php
@@ -69,7 +69,7 @@
 	public function test_standard_date_rfc822()
 	{
 		$this->assertEquals(
-			date('D, d M y H:i:s O', $this->time),
+			date(DATE_RFC822, $this->time),
 			standard_date('DATE_RFC822', $this->time)
 		);
 	}
@@ -79,7 +79,7 @@
 	public function test_standard_date_atom()
 	{
 		$this->assertEquals(
-			date("Y-m-d\TH:i:sO", $this->time),
+			date(DATE_ATOM, $this->time),
 			standard_date('DATE_ATOM', $this->time)
 		);
 	}
@@ -89,7 +89,7 @@
 	public function test_standard_date_cookie()
 	{
 		$this->assertEquals(
-			date("l, d-M-y H:i:s \U\T\C", $this->time),
+			date(DATE_COOKIE, $this->time),
 			standard_date('DATE_COOKIE', $this->time)
 		);
 	}
@@ -99,7 +99,7 @@
 	public function test_standard_date_iso8601()
 	{
 		$this->assertEquals(
-			date("Y-m-d\TH:i:sO", $this->time),
+			date(DATE_ISO8601, $this->time),
 			standard_date('DATE_ISO8601', $this->time)
 		);
 	}
@@ -109,7 +109,7 @@
 	public function test_standard_date_rfc850()
 	{
 		$this->assertEquals(
-			date("l, d-M-y H:i:s \U\T\C", $this->time),
+			date(DATE_RFC850, $this->time),
 			standard_date('DATE_RFC850', $this->time)
 		);
 	}
@@ -119,7 +119,7 @@
 	public function test_standard_date_rfc1036()
 	{
 		$this->assertEquals(
-			date('D, d M y H:i:s O', $this->time),
+			date(DATE_RFC1036, $this->time),
 			standard_date('DATE_RFC1036', $this->time)
 		);
 	}
@@ -129,7 +129,7 @@
 	public function test_standard_date_rfc1123()
 	{
 		$this->assertEquals(
-			date('D, d M Y H:i:s O', $this->time),
+			date(DATE_RFC1123, $this->time),
 			standard_date('DATE_RFC1123', $this->time)
 		);
 	}
@@ -139,7 +139,7 @@
 	public function test_standard_date_rfc2822()
 	{
 		$this->assertEquals(
-			date('D, d M Y H:i:s O', $this->time),
+			date(DATE_RFC2822, $this->time),
 			standard_date('DATE_RFC2822', $this->time)
 		);
 	}
@@ -149,7 +149,7 @@
 	public function test_standard_date_rss()
 	{
 		$this->assertEquals(
-			date('D, d M Y H:i:s O', $this->time),
+			date(DATE_RSS, $this->time),
 			standard_date('DATE_RSS', $this->time)
 		);
 	}
@@ -159,7 +159,7 @@
 	public function test_standard_date_w3c()
 	{
 		$this->assertEquals(
-			date("Y-m-d\TH:i:sO", $this->time),
+			date(DATE_W3C, $this->time),
 			standard_date('DATE_W3C', $this->time)
 		);
 	}
diff --git a/tests/codeigniter/helpers/directory_helper_test.php b/tests/codeigniter/helpers/directory_helper_test.php
index 176ff1d..c39ccd8 100644
--- a/tests/codeigniter/helpers/directory_helper_test.php
+++ b/tests/codeigniter/helpers/directory_helper_test.php
@@ -19,6 +19,7 @@
 				'benchmark.html' => '',
 				'database' => array('active_record.html' => '', 'binds.html' => ''),
 				'email.html' => '',
+				'0' => '',
 				'.hiddenfile.txt' => ''
 			)
 		);
@@ -30,7 +31,8 @@
 			'libraries' => array(
 				'benchmark.html',
 				'database' => array('active_record.html', 'binds.html'),
-				'email.html'
+				'email.html',
+				'0'
 			)
 		);
 
diff --git a/tests/codeigniter/helpers/html_helper_test.php b/tests/codeigniter/helpers/html_helper_test.php
index 9a7bb48..4dd717f 100644
--- a/tests/codeigniter/helpers/html_helper_test.php
+++ b/tests/codeigniter/helpers/html_helper_test.php
@@ -22,6 +22,22 @@
 		$this->assertEquals('<h2 class="bar">foobar</h2>', heading('foobar', 2, 'class="bar"'));
 	}
 
+	public function test_heading_array_attributes()
+	{
+		// Test array of attributes
+		$this->assertEquals('<h2 class="bar" id="foo">foobar</h2>', heading('foobar', 2, array('class' => 'bar', 'id' => 'foo')));
+	}
+
+	public function test_heading_object_attributes()
+	{
+		// Test array of attributes
+		$this->assertEquals('<h2 class="bar" id="foo">foobar</h2>', heading('foobar', 2, array('class' => 'bar', 'id' => 'foo')));
+		$test = new stdClass;
+		$test->class = "bar";
+		$test->id = "foo";
+		$this->assertEquals('<h2 class="bar" id="foo">foobar</h2>', heading('foobar', 2, $test));
+	}
+
 	// ------------------------------------------------------------------------
 
 	public function test_Ul()
@@ -72,5 +88,4 @@
 		$this->assertEquals($expect, meta(array('name' => 'foo')));
 
 	}
-
 }
\ No newline at end of file
diff --git a/tests/codeigniter/libraries/Calendar_test.php b/tests/codeigniter/libraries/Calendar_test.php
new file mode 100644
index 0000000..95668d7
--- /dev/null
+++ b/tests/codeigniter/libraries/Calendar_test.php
@@ -0,0 +1,204 @@
+<?php
+
+class Calendar_test extends CI_TestCase {
+
+	function __construct()
+	{
+		$obj = new stdClass;
+		$obj->calendar = new Mock_Libraries_Calendar();
+
+		$this->calendar = $obj->calendar;
+	}
+
+	function test_initialize()
+	{
+		$this->calendar->initialize(array(
+			'month_type'	=>	'short',
+			'start_day'	=>	'monday'
+		));
+		$this->assertEquals('short', $this->calendar->month_type);
+		$this->assertEquals('monday', $this->calendar->start_day);
+	}
+
+	/**
+	 * @covers Mock_Libraries_Calendar::parse_template
+	 */
+	function test_generate()
+	{
+		$no_events = '<table border="0" cellpadding="4" cellspacing="0">
+
+<tr>
+<th colspan="7">September&nbsp;2011</th>
+
+</tr>
+
+<tr>
+<td>Su</td><td>Mo</td><td>Tu</td><td>We</td><td>Th</td><td>Fr</td><td>Sa</td>
+</tr>
+
+<tr>
+<td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>1</td><td>2</td><td>3</td>
+</tr>
+
+<tr>
+<td>4</td><td>5</td><td>6</td><td>7</td><td>8</td><td>9</td><td>10</td>
+</tr>
+
+<tr>
+<td>11</td><td>12</td><td>13</td><td>14</td><td>15</td><td>16</td><td>17</td>
+</tr>
+
+<tr>
+<td>18</td><td>19</td><td>20</td><td>21</td><td>22</td><td>23</td><td>24</td>
+</tr>
+
+<tr>
+<td>25</td><td>26</td><td>27</td><td>28</td><td>29</td><td>30</td><td>&nbsp;</td>
+</tr>
+
+</table>';
+
+		$this->assertEquals($no_events, $this->calendar->generate(2011, 9));
+
+		$data = array(
+			3  => 'http://example.com/news/article/2006/03/',
+			7  => 'http://example.com/news/article/2006/07/',
+			13 => 'http://example.com/news/article/2006/13/',
+			26 => 'http://example.com/news/article/2006/26/'
+		);
+
+		$events = '<table border="0" cellpadding="4" cellspacing="0">
+
+<tr>
+<th colspan="7">September&nbsp;2011</th>
+
+</tr>
+
+<tr>
+<td>Su</td><td>Mo</td><td>Tu</td><td>We</td><td>Th</td><td>Fr</td><td>Sa</td>
+</tr>
+
+<tr>
+<td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>1</td><td>2</td><td><a href="http://example.com/news/article/2006/03/">3</a></td>
+</tr>
+
+<tr>
+<td>4</td><td>5</td><td>6</td><td><a href="http://example.com/news/article/2006/07/">7</a></td><td>8</td><td>9</td><td>10</td>
+</tr>
+
+<tr>
+<td>11</td><td>12</td><td><a href="http://example.com/news/article/2006/13/">13</a></td><td>14</td><td>15</td><td>16</td><td>17</td>
+</tr>
+
+<tr>
+<td>18</td><td>19</td><td>20</td><td>21</td><td>22</td><td>23</td><td>24</td>
+</tr>
+
+<tr>
+<td>25</td><td><a href="http://example.com/news/article/2006/26/">26</a></td><td>27</td><td>28</td><td>29</td><td>30</td><td>&nbsp;</td>
+</tr>
+
+</table>';
+
+		$this->assertEquals($events, $this->calendar->generate(2011, 9, $data));
+	}
+
+	function test_get_month_name()
+	{
+		$this->calendar->month_type = NULL;
+		$this->assertEquals('January', $this->calendar->get_month_name('01'));
+
+		$this->calendar->month_type = 'short';
+		$this->assertEquals('Jan', $this->calendar->get_month_name('01'));
+	}
+
+	function test_get_day_names()
+	{
+		$this->assertEquals(array(
+			'Sunday',
+			'Monday',
+			'Tuesday',
+			'Wednesday',
+			'Thursday',
+			'Friday',
+			'Saturday'
+		), $this->calendar->get_day_names('long'));
+
+		$this->assertEquals(array(
+			'Sun',
+			'Mon',
+			'Tue',
+			'Wed',
+			'Thu',
+			'Fri',
+			'Sat'
+		), $this->calendar->get_day_names('short'));
+
+		$this->calendar->day_type = NULL;
+
+		$this->assertEquals(array(
+			'Su',
+			'Mo',
+			'Tu',
+			'We',
+			'Th',
+			'Fr',
+			'Sa'
+		), $this->calendar->get_day_names());
+	}
+
+	function test_adjust_date()
+	{
+		$this->assertEquals(array('month' => 8, 'year' => 2012), $this->calendar->adjust_date(8, 2012));
+		$this->assertEquals(array('month' => 1, 'year' => 2013), $this->calendar->adjust_date(13, 2012));
+	}
+
+	function test_get_total_days()
+	{
+		$this->assertEquals(0, $this->calendar->get_total_days(13, 2012));
+
+		$this->assertEquals(31, $this->calendar->get_total_days(1, 2012));
+		$this->assertEquals(28, $this->calendar->get_total_days(2, 2011));
+		$this->assertEquals(29, $this->calendar->get_total_days(2, 2012));
+		$this->assertEquals(31, $this->calendar->get_total_days(3, 2012));
+		$this->assertEquals(30, $this->calendar->get_total_days(4, 2012));
+		$this->assertEquals(31, $this->calendar->get_total_days(5, 2012));
+		$this->assertEquals(30, $this->calendar->get_total_days(6, 2012));
+		$this->assertEquals(31, $this->calendar->get_total_days(7, 2012));
+		$this->assertEquals(31, $this->calendar->get_total_days(8, 2012));
+		$this->assertEquals(30, $this->calendar->get_total_days(9, 2012));
+		$this->assertEquals(31, $this->calendar->get_total_days(10, 2012));
+		$this->assertEquals(30, $this->calendar->get_total_days(11, 2012));
+		$this->assertEquals(31, $this->calendar->get_total_days(12, 2012));
+	}
+
+	function test_default_template()
+	{
+		$array = array(
+			'table_open'				=> '<table border="0" cellpadding="4" cellspacing="0">',
+			'heading_row_start'			=> '<tr>',
+			'heading_previous_cell'		=> '<th><a href="{previous_url}">&lt;&lt;</a></th>',
+			'heading_title_cell'		=> '<th colspan="{colspan}">{heading}</th>',
+			'heading_next_cell'			=> '<th><a href="{next_url}">&gt;&gt;</a></th>',
+			'heading_row_end'			=> '</tr>',
+			'week_row_start'			=> '<tr>',
+			'week_day_cell'				=> '<td>{week_day}</td>',
+			'week_row_end'				=> '</tr>',
+			'cal_row_start'				=> '<tr>',
+			'cal_cell_start'			=> '<td>',
+			'cal_cell_start_today'		=> '<td>',
+			'cal_cell_content'			=> '<a href="{content}">{day}</a>',
+			'cal_cell_content_today'	=> '<a href="{content}"><strong>{day}</strong></a>',
+			'cal_cell_no_content'		=> '{day}',
+			'cal_cell_no_content_today'	=> '<strong>{day}</strong>',
+			'cal_cell_blank'			=> '&nbsp;',
+			'cal_cell_end'				=> '</td>',
+			'cal_cell_end_today'		=> '</td>',
+			'cal_row_end'				=> '</tr>',
+			'table_close'				=> '</table>'
+		);
+
+		$this->assertEquals($array, $this->calendar->default_template());
+	}
+
+}
\ No newline at end of file
diff --git a/tests/codeigniter/libraries/Session_test.php b/tests/codeigniter/libraries/Session_test.php
new file mode 100644
index 0000000..135f718
--- /dev/null
+++ b/tests/codeigniter/libraries/Session_test.php
@@ -0,0 +1,405 @@
+<?php
+
+/**
+ * Session driver library unit test
+ */
+class Session_test extends CI_TestCase {
+	protected $settings = array(
+		'use_cookies' => 0,
+	   	'use_only_cookies' => 0,
+	   	'cache_limiter' => false
+	);
+	protected $setting_vals = array();
+	protected $cookie_vals;
+	protected $session;
+
+	/**
+	 * Set up test framework
+	 */
+	public function set_up()
+	{
+		// Override settings
+		foreach ($this->settings as $name => $value) {
+			$this->setting_vals[$name] = ini_get('session.'.$name);
+			ini_set('session.'.$name, $value);
+		}
+
+		// Start with clean environment
+		$this->cookie_vals = $_COOKIE;
+		$_COOKIE = array();
+
+		// Establish necessary support classes
+		$obj = new stdClass;
+		$classes = array(
+			'config' => 'cfg',
+			'load' => 'load',
+			'input' => 'in'
+		);
+		foreach ($classes as $name => $abbr) {
+			$class = $this->ci_core_class($abbr);
+			$obj->$name = new $class;
+		}
+		$this->ci_instance($obj);
+
+		// Attach session instance locally
+		$config = array(
+			'sess_encrypt_cookie' => FALSE,
+			'sess_use_database' => FALSE,
+			'sess_table_name' => '',
+			'sess_expiration' => 7200,
+			'sess_expire_on_close' => FALSE,
+			'sess_match_ip' => FALSE,
+			'sess_match_useragent' => TRUE,
+			'sess_cookie_name' => 'ci_session',
+			'cookie_path' => '',
+			'cookie_domain' => '',
+			'cookie_secure' => FALSE,
+			'cookie_httponly' => FALSE,
+			'sess_time_to_update' => 300,
+			'time_reference' => 'local',
+			'cookie_prefix' => '',
+			'encryption_key' => 'foobar',
+			'sess_valid_drivers' => array(
+				'Mock_Libraries_Session_native',
+			   	'Mock_Libraries_Session_cookie'
+			)
+		);
+		$this->session = new Mock_Libraries_Session($config);
+	}
+
+	/**
+	 * Tear down test framework
+	 */
+	public function tear_down()
+	{
+		// Restore environment
+		if (session_id()) session_destroy();
+		$_SESSION = array();
+		$_COOKIE = $this->cookie_vals;
+
+		// Restore settings
+		foreach ($this->settings as $name => $value) {
+			ini_set('session.'.$name, $this->setting_vals[$name]);
+		}
+	}
+
+	/**
+	 * Test set_userdata() function
+	 *
+	 * @covers  CI_Session::set_userdata
+	 * @covers  CI_Session::userdata
+	 */
+	public function test_set_userdata()
+	{
+		// Set userdata values for each driver
+		$key1 = 'test1';
+		$ckey2 = 'test2';
+		$nkey2 = 'test3';
+		$cmsg1 = 'Some test data';
+		$cmsg2 = 42;
+		$nmsg1 = 'Other test data';
+		$nmsg2 = true;
+		$this->session->cookie->set_userdata($key1, $cmsg1);
+		$this->session->set_userdata($ckey2, $cmsg2);
+		$this->session->native->set_userdata($key1, $nmsg1);
+		$this->session->set_userdata($nkey2, $nmsg2);
+
+		// Verify independent messages
+		$this->assertEquals($cmsg1, $this->session->cookie->userdata($key1));
+		$this->assertEquals($nmsg1, $this->session->native->userdata($key1));
+
+		// Verify pre-selected driver sets
+		$this->assertEquals($cmsg2, $this->session->cookie->userdata($ckey2));
+		$this->assertEquals($nmsg2, $this->session->native->userdata($nkey2));
+
+		// Verify no crossover
+		$this->assertNull($this->session->cookie->userdata($nkey2));
+		$this->assertNull($this->session->native->userdata($ckey2));
+	}
+
+	/**
+	 * Test the has_userdata() function
+	 *
+	 * @covers	CI_Session::has_userdata
+	 */
+	public function test_has_userdata()
+	{
+		// Set a userdata value for each driver
+		$key = 'hastest';
+		$cmsg = 'My test data';
+		$this->session->cookie->set_userdata($key, $cmsg);
+		$nmsg = 'Your test data';
+		$this->session->native->set_userdata($key, $nmsg);
+
+		// Verify values exist
+		$this->assertTrue($this->session->cookie->has_userdata($key));
+		$this->assertTrue($this->session->native->has_userdata($key));
+
+		// Verify non-existent values
+		$nokey = 'hasnot';
+		$this->assertFalse($this->session->cookie->has_userdata($nokey));
+		$this->assertFalse($this->session->native->has_userdata($nokey));
+	}
+
+	/**
+	 * Test the all_userdata() function
+	 *
+	 * @covers	CI_Session::all_userdata
+	 */
+	public function test_all_userdata()
+	{
+		// Set a specific series of data for each driver
+		$cdata = array(
+			'one' => 'first',
+			'two' => 'second',
+		   	'three' => 'third',
+		   	'foo' => 'bar',
+		   	'bar' => 'baz'
+		);
+		$ndata = array(
+			'one' => 'gold',
+		   	'two' => 'silver',
+		   	'three' => 'bronze',
+		   	'foo' => 'baz',
+		   	'bar' => 'foo'
+		);
+		$this->session->cookie->set_userdata($cdata);
+		$this->session->native->set_userdata($ndata);
+
+		// Make sure all values are present
+		$call = $this->session->cookie->all_userdata();
+		foreach ($cdata as $key => $value) {
+			$this->assertEquals($value, $call[$key]);
+		}
+		$nall = $this->session->native->all_userdata();
+		foreach ($ndata as $key => $value) {
+			$this->assertEquals($value, $nall[$key]);
+		}
+	}
+
+	/**
+	 * Test the unset_userdata() function
+	 *
+	 * @covers	CI_Session::unset_userdata
+	 */
+	public function test_unset_userdata()
+	{
+		// Set a userdata message for each driver
+		$key = 'untest';
+		$cmsg = 'Other test data';
+		$this->session->cookie->set_userdata($key, $cmsg);
+		$nmsg = 'Sundry test data';
+		$this->session->native->set_userdata($key, $nmsg);
+
+		// Verify independent messages
+		$this->assertEquals($this->session->cookie->userdata($key), $cmsg);
+		$this->assertEquals($this->session->native->userdata($key), $nmsg);
+
+		// Unset them and verify absence
+		$this->session->cookie->unset_userdata($key);
+		$this->session->native->unset_userdata($key);
+		$this->assertNull($this->session->cookie->userdata($key));
+		$this->assertNull($this->session->native->userdata($key));
+	}
+
+	/**
+	 * Test the flashdata() functions
+	 *
+	 * @covers	CI_Session::set_flashdata
+	 * @covers	CI_Session::flashdata
+	 */
+	public function test_flashdata()
+	{
+		// Set flashdata message for each driver
+		$key = 'fltest';
+		$cmsg = 'Some flash data';
+		$this->session->cookie->set_flashdata($key, $cmsg);
+		$nmsg = 'Other flash data';
+		$this->session->native->set_flashdata($key, $nmsg);
+
+		// Simulate page reload
+		$this->session->cookie->reload();
+		$this->session->native->reload();
+
+		// Verify independent messages
+		$this->assertEquals($cmsg, $this->session->cookie->flashdata($key));
+		$this->assertEquals($nmsg, $this->session->native->flashdata($key));
+
+		// Simulate next page reload
+		$this->session->cookie->reload();
+		$this->session->native->reload();
+
+		// Verify absence of messages
+		$this->assertNull($this->session->cookie->flashdata($key));
+		$this->assertNull($this->session->native->flashdata($key));
+	}
+
+	/**
+	 * Test the keep_flashdata() function
+	 *
+	 * @covers	CI_Session::keep_flashdata
+	 */
+	public function test_keep_flashdata()
+	{
+		// Set flashdata message for each driver
+		$key = 'kfltest';
+		$cmsg = 'My flash data';
+		$this->session->cookie->set_flashdata($key, $cmsg);
+		$nmsg = 'Your flash data';
+		$this->session->native->set_flashdata($key, $nmsg);
+
+		// Simulate page reload and verify independent messages
+		$this->session->cookie->reload();
+		$this->session->native->reload();
+		$this->assertEquals($cmsg, $this->session->cookie->flashdata($key));
+		$this->assertEquals($nmsg, $this->session->native->flashdata($key));
+
+		// Keep messages
+		$this->session->cookie->keep_flashdata($key);
+		$this->session->native->keep_flashdata($key);
+
+		// Simulate next page reload and verify message persistence
+		$this->session->cookie->reload();
+		$this->session->native->reload();
+		$this->assertEquals($cmsg, $this->session->cookie->flashdata($key));
+		$this->assertEquals($nmsg, $this->session->native->flashdata($key));
+
+		// Simulate next page reload and verify absence of messages
+		$this->session->cookie->reload();
+		$this->session->native->reload();
+		$this->assertNull($this->session->cookie->flashdata($key));
+		$this->assertNull($this->session->native->flashdata($key));
+	}
+
+	/**
+	 * Test the all_flashdata() function
+	 *
+	 * @covers	CI_Session::all_flashdata
+	 */
+	public function test_all_flashdata()
+	{
+		// Set a specific series of data for each driver
+		$cdata = array(
+			'one' => 'first',
+		   	'two' => 'second',
+		   	'three' => 'third',
+		   	'foo' => 'bar',
+		   	'bar' => 'baz'
+		);
+		$ndata = array(
+			'one' => 'gold',
+		   	'two' => 'silver',
+		   	'three' => 'bronze',
+		   	'foo' => 'baz',
+		   	'bar' => 'foo'
+		);
+		$this->session->cookie->set_flashdata($cdata);
+		$this->session->native->set_flashdata($ndata);
+
+		// Simulate page reload and make sure all values are present
+		$this->session->cookie->reload();
+		$this->session->native->reload();
+		$this->assertEquals($cdata, $this->session->cookie->all_flashdata());
+		$this->assertEquals($ndata, $this->session->native->all_flashdata());
+	}
+
+	/**
+	 * Test the tempdata() functions
+	 *
+	 * @covers	CI_Session::set_tempdata
+	 * @covers	CI_Session::tempdata
+	 */
+	public function test_set_tempdata()
+	{
+		// Set tempdata message for each driver - 1 second timeout
+		$key = 'tmptest';
+		$cmsg = 'Some temp data';
+		$this->session->cookie->set_tempdata($key, $cmsg, 1);
+		$nmsg = 'Other temp data';
+		$this->session->native->set_tempdata($key, $nmsg, 1);
+
+		// Simulate page reload and verify independent messages
+		$this->session->cookie->reload();
+		$this->session->native->reload();
+		$this->assertEquals($cmsg, $this->session->cookie->tempdata($key));
+		$this->assertEquals($nmsg, $this->session->native->tempdata($key));
+
+		// Wait 2 seconds, simulate page reload and verify message absence
+		sleep(2);
+		$this->session->cookie->reload();
+		$this->session->native->reload();
+		$this->assertNull($this->session->cookie->tempdata($key));
+		$this->assertNull($this->session->native->tempdata($key));
+	}
+
+	/**
+	 * Test the unset_tempdata() function
+	 *
+	 * @covers	CI_Session::unset_tempdata
+	 */
+	public function test_unset_tempdata()
+	{
+		// Set tempdata message for each driver - 1 second timeout
+		$key = 'utmptest';
+		$cmsg = 'My temp data';
+		$this->session->cookie->set_tempdata($key, $cmsg, 1);
+		$nmsg = 'Your temp data';
+		$this->session->native->set_tempdata($key, $nmsg, 1);
+
+		// Verify independent messages
+		$this->assertEquals($cmsg, $this->session->cookie->tempdata($key));
+		$this->assertEquals($nmsg, $this->session->native->tempdata($key));
+
+		// Unset data and verify message absence
+		$this->session->cookie->unset_tempdata($key);
+		$this->session->native->unset_tempdata($key);
+		$this->assertNull($this->session->cookie->tempdata($key));
+		$this->assertNull($this->session->native->tempdata($key));
+	}
+
+	/**
+	 * Test the sess_regenerate() function
+	 *
+	 * @covers	CI_Session::sess_regenerate
+	 */
+	public function test_sess_regenerate()
+	{
+		// Get current session id, regenerate, and compare
+		// Cookie driver
+		$oldid = $this->session->cookie->userdata('session_id');
+		$this->session->cookie->sess_regenerate();
+		$newid = $this->session->cookie->userdata('session_id');
+		$this->assertNotEquals($oldid, $newid);
+
+		// Native driver - bug #55267 (https://bugs.php.net/bug.php?id=55267) prevents testing this
+		// $oldid = session_id();
+		// $this->session->native->sess_regenerate();
+		// $oldid = session_id();
+		// $this->assertNotEquals($oldid, $newid);
+	}
+
+	/**
+	 * Test the sess_destroy() function
+	 *
+	 * @covers	CI_Session::sess_destroy
+	 */
+	public function test_sess_destroy()
+	{
+		// Set a userdata message, destroy session, and verify absence
+		$key = 'dsttest';
+		$msg = 'More test data';
+
+		// Cookie driver
+		$this->session->cookie->set_userdata($key, $msg);
+		$this->assertEquals($msg, $this->session->cookie->userdata($key));
+		$this->session->cookie->sess_destroy();
+		$this->assertNull($this->session->cookie->userdata($key));
+
+		// Native driver
+		$this->session->native->set_userdata($key, $msg);
+		$this->assertEquals($msg, $this->session->native->userdata($key));
+		$this->session->native->sess_destroy();
+		$this->assertNull($this->session->native->userdata($key));
+	}
+}
+
diff --git a/tests/codeigniter/libraries/Upload_test.php b/tests/codeigniter/libraries/Upload_test.php
new file mode 100644
index 0000000..d79a3ff
--- /dev/null
+++ b/tests/codeigniter/libraries/Upload_test.php
@@ -0,0 +1,270 @@
+<?php
+
+class Upload_test extends CI_TestCase {
+
+	function set_up()
+	{
+		$obj = new stdClass;
+		$obj->upload = new Mock_Libraries_Upload();
+		$obj->security = new Mock_Core_Security();
+		$obj->lang = new Mock_Core_Lang();
+
+		$this->ci_instance($obj);
+		$this->upload = $obj->upload;
+
+		vfsStreamWrapper::register();
+		vfsStreamWrapper::setRoot(new vfsStreamDirectory('testDir'));
+
+		$this->_test_dir = vfsStreamWrapper::getRoot();
+	}
+
+	function test_do_upload() 
+	{
+		$this->markTestIncomplete('We can\'t really test this at the moment because of the call to `is_uploaded_file` in do_upload which isn\'t supported by vfsStream');
+	}
+
+	function test_data()
+	{
+		$data = array(
+				'file_name'		=> 'hello.txt',
+				'file_type'		=> 'text/plain',
+				'file_path'		=> '/tmp/',
+				'full_path'		=> '/tmp/hello.txt',
+				'raw_name'		=> 'hello',
+				'orig_name'		=> 'hello.txt',
+				'client_name'		=> '',
+				'file_ext'		=> '.txt',
+				'file_size'		=> 100,
+				'is_image'		=> FALSE,
+				'image_width'		=> '',
+				'image_height'		=> '',
+				'image_type'		=> '',
+				'image_size_str'	=> ''
+			);
+
+		$this->upload->set_upload_path('/tmp/');
+
+		foreach ($data as $k => $v)
+		{
+			$this->upload->{$k}	= $v;
+		}
+
+		$this->assertEquals('hello.txt', $this->upload->data('file_name'));
+		$this->assertEquals($data, $this->upload->data());
+	}
+
+	function test_set_upload_path()
+	{
+		$this->upload->set_upload_path('/tmp/');
+		$this->assertEquals('/tmp/', $this->upload->upload_path);
+
+		$this->upload->set_upload_path('/tmp');
+		$this->assertEquals('/tmp/', $this->upload->upload_path);
+	}
+
+	function test_set_filename()
+	{
+		$file1 = vfsStream::newFile('hello-world.txt')->withContent('Hello world.')->at($this->_test_dir);
+		$this->upload->file_ext = '.txt';
+
+		$this->assertEquals('helloworld.txt', $this->upload->set_filename(vfsStream::url('testDir').'/', 'helloworld.txt'));
+		$this->assertEquals('hello-world1.txt', $this->upload->set_filename(vfsStream::url('testDir').'/', 'hello-world.txt'));
+	}
+
+	function test_set_max_filesize()
+	{
+		$this->upload->set_max_filesize(100);
+		$this->assertEquals(100, $this->upload->max_size);
+	}	
+
+	function test_set_max_filename()
+	{
+		$this->upload->set_max_filename(100);
+		$this->assertEquals(100, $this->upload->max_filename);
+	}
+
+	function test_set_max_width()
+	{
+		$this->upload->set_max_width(100);
+		$this->assertEquals(100, $this->upload->max_width);
+	}	
+
+	function test_set_max_height()
+	{
+		$this->upload->set_max_height(100);
+		$this->assertEquals(100, $this->upload->max_height);
+	}
+
+	function test_set_allowed_types()
+	{
+		$this->upload->set_allowed_types('*');
+		$this->assertEquals('*', $this->upload->allowed_types);
+
+		$this->upload->set_allowed_types('foo|bar');
+		$this->assertEquals(array('foo', 'bar'), $this->upload->allowed_types);
+	}
+
+	function test_set_image_properties()
+	{
+		$this->upload->file_type = 'image/gif';
+		$this->upload->file_temp = 'tests/mocks/uploads/ci_logo.gif';
+
+		$props = array(
+			'image_width'	=>	170,
+			'image_height'	=>	73,
+			'image_type'	=>	'gif',
+			'image_size_str'	=>	'width="170" height="73"'
+		);
+
+		$this->upload->set_image_properties($this->upload->file_temp);
+
+		$this->assertEquals($props['image_width'], $this->upload->image_width);
+		$this->assertEquals($props['image_height'], $this->upload->image_height);
+		$this->assertEquals($props['image_type'], $this->upload->image_type);
+		$this->assertEquals($props['image_size_str'], $this->upload->image_size_str);
+	}
+
+	function test_set_xss_clean()
+	{
+		$this->upload->set_xss_clean(TRUE);
+		$this->assertTrue($this->upload->xss_clean);
+
+		$this->upload->set_xss_clean(FALSE);
+		$this->assertFalse($this->upload->xss_clean);
+	}
+
+	function test_is_image()
+	{
+		$this->upload->file_type = 'image/x-png';
+		$this->assertTrue($this->upload->is_image());
+
+		$this->upload->file_type = 'text/plain';
+		$this->assertFalse($this->upload->is_image());
+	}
+
+	function test_is_allowed_filetype()
+	{
+		$this->upload->allowed_types = array('html', 'gif');
+
+		$this->upload->file_ext = '.txt';
+		$this->upload->file_type = 'text/plain';
+		$this->assertFalse($this->upload->is_allowed_filetype(FALSE));
+		$this->assertFalse($this->upload->is_allowed_filetype(TRUE));
+
+		$this->upload->file_ext = '.html';
+		$this->upload->file_type = 'text/html';
+		$this->assertTrue($this->upload->is_allowed_filetype(FALSE));
+		$this->assertTrue($this->upload->is_allowed_filetype(TRUE));
+
+		$this->upload->file_temp = 'tests/mocks/uploads/ci_logo.gif';
+		$this->upload->file_ext = '.gif';
+		$this->upload->file_type = 'image/gif';
+		$this->assertTrue($this->upload->is_allowed_filetype());
+	}
+
+	function test_is_allowed_filesize()
+	{
+		$this->upload->max_size = 100;
+		$this->upload->file_size = 99;
+
+		$this->assertTrue($this->upload->is_allowed_filesize());
+
+		$this->upload->file_size = 101;
+		$this->assertFalse($this->upload->is_allowed_filesize());
+	}
+
+	function test_is_allowed_dimensions()
+	{
+		$this->upload->file_type = 'text/plain';
+		$this->assertTrue($this->upload->is_allowed_dimensions());
+
+		$this->upload->file_type = 'image/gif';
+		$this->upload->file_temp = 'tests/mocks/uploads/ci_logo.gif';
+
+		$this->upload->max_width = 10;		
+		$this->assertFalse($this->upload->is_allowed_dimensions());
+
+		$this->upload->max_width = 170;
+		$this->upload->max_height = 10;
+		$this->assertFalse($this->upload->is_allowed_dimensions());
+
+		$this->upload->max_height = 73;
+		$this->assertTrue($this->upload->is_allowed_dimensions());
+	}
+
+	function test_validate_upload_path()
+	{
+		$this->upload->upload_path = '';
+		$this->assertFalse($this->upload->validate_upload_path());
+
+		$this->upload->upload_path = vfsStream::url('testDir');
+		$this->assertTrue($this->upload->validate_upload_path());
+	}
+
+	function test_get_extension()
+	{
+		$this->assertEquals('.txt', $this->upload->get_extension('hello.txt'));
+		$this->assertEquals('.htaccess', $this->upload->get_extension('.htaccess'));
+		$this->assertEquals('', $this->upload->get_extension('hello'));
+	}
+
+	function test_clean_file_name()
+	{
+		$this->assertEquals('hello.txt', $this->upload->clean_file_name('hello.txt'));
+		$this->assertEquals('hello.txt', $this->upload->clean_file_name('%253chell>o.txt'));
+	}
+
+	function test_limit_filename_length()
+	{
+		$this->assertEquals('hello.txt', $this->upload->limit_filename_length('hello.txt', 10));
+		$this->assertEquals('hello.txt', $this->upload->limit_filename_length('hello-world.txt', 9));
+	}
+
+	function test_do_xss_clean()
+	{
+		$file1 = vfsStream::newFile('file1.txt')->withContent('The billy goat was waiting for them.')->at($this->_test_dir);
+		$file2 = vfsStream::newFile('file2.txt')->at($this->_test_dir);
+		$file3 = vfsStream::newFile('file3.txt')->withContent('<script type="text/javascript">alert("Boo! said the billy goat")</script>')->at($this->_test_dir);
+
+		$this->upload->file_temp = vfsStream::url('file1.txt');
+		$this->assertTrue($this->upload->do_xss_clean());
+
+		$this->upload->file_temp = vfsStream::url('file2.txt');
+		$this->assertFalse($this->upload->do_xss_clean());
+
+		$this->upload->file_temp = vfsStream::url('file3.txt');
+		$this->assertFalse($this->upload->do_xss_clean());
+
+		$this->upload->file_temp = 'tests/mocks/uploads/ci_logo.gif';
+		$this->assertTrue($this->upload->do_xss_clean());
+	}
+
+	function test_set_error()
+	{
+		$errors = array(
+			'An error!'
+		);
+
+		$another = 'Another error!';
+
+		$this->upload->set_error($errors);
+		$this->assertEquals($errors, $this->upload->error_msg);
+
+		$errors[] = $another;
+		$this->upload->set_error($another);
+		$this->assertEquals($errors, $this->upload->error_msg);
+	}
+
+	function test_display_errors()
+	{
+		$this->upload->error_msg[] = 'Error test';
+		$this->assertEquals('<p>Error test</p>', $this->upload->display_errors());
+	}
+
+	function test_mimes_types()
+	{
+		$this->assertEquals('text/plain', $this->upload->mimes_types('txt'));
+		$this->assertFalse($this->upload->mimes_types('foobar'));
+	}
+
+}
\ No newline at end of file
diff --git a/tests/mocks/autoloader.php b/tests/mocks/autoloader.php
index be1c222..88d016b 100644
--- a/tests/mocks/autoloader.php
+++ b/tests/mocks/autoloader.php
@@ -26,10 +26,14 @@
 		'Email', 'Encrypt', 'Form_validation',
 		'Ftp', 'Image_lib', 'Javascript',
 		'Log', 'Migration', 'Pagination',
-		'Parser', 'Profiler', 'Session',
-		'Table', 'Trackback', 'Typography',
-		'Unit_test', 'Upload', 'User_agent',
-		'Xmlrpc', 'Zip',
+		'Parser', 'Profiler', 'Table',
+	   	'Trackback', 'Typography', 'Unit_test',
+	   	'Upload', 'User_agent', 'Xmlrpc',
+	   	'Zip',
+	);
+
+	$ci_drivers = array(
+		'Session',
 	);
 
 	if (strpos($class, 'Mock_') === 0)
@@ -52,6 +56,15 @@
 			$dir = BASEPATH.'libraries'.DIRECTORY_SEPARATOR;
 			$class = ($subclass === 'Driver_Library') ? 'Driver' : $subclass;
 		}
+		elseif (in_array($subclass, $ci_drivers))
+		{
+			$dir = BASEPATH.'libraries'.DIRECTORY_SEPARATOR.$subclass.DIRECTORY_SEPARATOR;
+			$class = $subclass;
+		}
+		elseif (in_array(($parent = strtok($subclass, '_')), $ci_drivers)) {
+			$dir = BASEPATH.'libraries'.DIRECTORY_SEPARATOR.$parent.DIRECTORY_SEPARATOR.'drivers'.DIRECTORY_SEPARATOR;
+			$class = $subclass;
+		}
 		elseif (preg_match('/^CI_DB_(.+)_(driver|forge|result|utility)$/', $class, $m) && count($m) === 3)
 		{
 			$driver_path = BASEPATH.'database'.DIRECTORY_SEPARATOR.'drivers'.DIRECTORY_SEPARATOR;
@@ -91,4 +104,4 @@
 	}
 
 	include_once($file);
-}
\ No newline at end of file
+}
diff --git a/tests/mocks/core/lang.php b/tests/mocks/core/lang.php
new file mode 100644
index 0000000..1b99aed
--- /dev/null
+++ b/tests/mocks/core/lang.php
@@ -0,0 +1,15 @@
+<?php
+
+class Mock_Core_Lang extends CI_Lang {
+
+	function line($line = '')
+	{
+		return FALSE;
+	}
+
+	function load($langfile, $idiom = '', $return = false, $add_suffix = true, $alt_path = '')
+	{
+		return;
+	}
+
+}
\ No newline at end of file
diff --git a/tests/mocks/database/config/pdo/mysql.php b/tests/mocks/database/config/pdo/mysql.php
index fefe0d6..96608f7 100644
--- a/tests/mocks/database/config/pdo/mysql.php
+++ b/tests/mocks/database/config/pdo/mysql.php
@@ -4,13 +4,13 @@
 
 	// Typical Database configuration
 	'pdo/mysql' => array(
-		'dsn' => '',
+		'dsn' => 'mysql:host=localhost;dbname=ci_test',
 		'hostname' => 'localhost',
 		'username' => 'travis',
 		'password' => '',
 		'database' => 'ci_test',
 		'dbdriver' => 'pdo',
-		'pdodriver' => 'mysql'
+		'subdriver' => 'mysql'
 	),
 
 	// Database configuration with failover
@@ -21,16 +21,16 @@
 		'password' => 'wrong password',
 		'database' => 'not_ci_test',
 		'dbdriver' => 'pdo',
-		'pdodriver' => 'mysql',
+		'subdriver' => 'mysql',
 		'failover' => array(
 			array(
-				'dsn' => '',
+				'dsn' => 'mysql:host=localhost;dbname=ci_test',
 				'hostname' => 'localhost',
 				'username' => 'travis',
 				'password' => '',
 				'database' => 'ci_test',
 				'dbdriver' => 'pdo',
-				'pdodriver' => 'mysql'
+				'subdriver' => 'mysql'
 			)
 		)
 	)
diff --git a/tests/mocks/database/config/pdo/pgsql.php b/tests/mocks/database/config/pdo/pgsql.php
index ddd638c..e55e3ea 100644
--- a/tests/mocks/database/config/pdo/pgsql.php
+++ b/tests/mocks/database/config/pdo/pgsql.php
@@ -10,7 +10,7 @@
 		'password' => '',
 		'database' => 'ci_test',
 		'dbdriver' => 'pdo',
-		'pdodriver' => 'pgsql'
+		'subdriver' => 'pgsql'
 	),
 
 	// Database configuration with failover
@@ -21,7 +21,7 @@
 		'password' => 'wrong password',
 		'database' => 'not_ci_test',
 		'dbdriver' => 'pdo',
-		'pdodriver' => 'pgsql',
+		'subdriver' => 'pgsql',
 		'failover' => array(
 			array(
 				'dsn' => 'pgsql:host=localhost;port=5432;dbname=ci_test;',
@@ -30,7 +30,7 @@
 				'password' => '',
 				'database' => 'ci_test',
 				'dbdriver' => 'pdo',
-				'pdodriver' => 'pgsql'
+				'subdriver' => 'pgsql'
 			)
 		)
 	)
diff --git a/tests/mocks/database/config/pdo/sqlite.php b/tests/mocks/database/config/pdo/sqlite.php
index 3646184..1bf56b3 100644
--- a/tests/mocks/database/config/pdo/sqlite.php
+++ b/tests/mocks/database/config/pdo/sqlite.php
@@ -10,7 +10,7 @@
 		'password' => 'sqlite',
 		'database' => 'sqlite',
 		'dbdriver' => 'pdo',
-		'pdodriver' => 'sqlite'
+		'subdriver' => 'sqlite'
 	),
 
 	// Database configuration with failover
@@ -21,7 +21,7 @@
 		'password' => 'sqlite',
 		'database' => 'sqlite',
 		'dbdriver' => 'pdo',
-		'pdodriver' => 'sqlite',
+		'subdriver' => 'sqlite',
 		'failover' => array(
 			array(
 				'dsn' => 'sqlite:/'.realpath(__DIR__.'/../..').'/ci_test.sqlite',
@@ -30,7 +30,7 @@
 				'password' => 'sqlite',
 				'database' => 'sqlite',
 				'dbdriver' => 'pdo',
-				'pdodriver' => 'sqlite'
+				'subdriver' => 'sqlite'
 			)
 		)
 	)
diff --git a/tests/mocks/database/db.php b/tests/mocks/database/db.php
index 30504bb..7565853 100644
--- a/tests/mocks/database/db.php
+++ b/tests/mocks/database/db.php
@@ -45,9 +45,9 @@
 		);
 
 		$config = array_merge($this->config[$group], $params);
-		$dsnstring = ( ! empty($config['dsn'])) ? $config['dsn'] : FALSE;
-		$pdodriver = ( ! empty($config['pdodriver'])) ? $config['pdodriver'] : FALSE;
-		$failover = ( ! empty($config['failover'])) ? $config['failover'] : FALSE;
+		$dsnstring = empty($config['dsn']) ? FALSE : $config['dsn'];
+		$subdriver = empty($config['subdriver']) ? FALSE: $config['subdriver'];
+		$failover = empty($config['failover']) ? FALSE : $config['failover'];
 
 		$dsn = $config['dbdriver'].'://'.$config['username'].':'.$config['password']
 			       .'@'.$config['hostname'].'/'.$config['database'];
@@ -55,7 +55,7 @@
 		// Build the parameter
 		$other_params = array_slice($config, 6);
 		if ($dsnstring) $other_params['dsn'] = $dsnstring;
-		if ($pdodriver) $other_params['pdodriver'] = $pdodriver;
+		if ($subdriver) $other_params['subdriver'] = $subdriver;
 		if ($failover) $other_params['failover'] = $failover;
 
 		return $dsn.'?'.http_build_query($other_params);
diff --git a/tests/mocks/libraries/calendar.php b/tests/mocks/libraries/calendar.php
new file mode 100644
index 0000000..8fee536
--- /dev/null
+++ b/tests/mocks/libraries/calendar.php
@@ -0,0 +1,25 @@
+<?php
+
+class Mock_Libraries_Calendar extends CI_Calendar {
+
+	public function __construct($config = array())
+	{
+		$this->CI = new stdClass;
+		$this->CI->lang = new Mock_Core_Lang();
+
+		if ( ! in_array('calendar_lang.php', $this->CI->lang->is_loaded, TRUE))
+		{
+			$this->CI->lang->load('calendar');
+		}
+
+		$this->local_time = time();
+
+		if (count($config) > 0)
+		{
+			$this->initialize($config);
+		}
+
+		log_message('debug', 'Calendar Class Initialized');
+	}
+
+}
\ No newline at end of file
diff --git a/tests/mocks/libraries/session.php b/tests/mocks/libraries/session.php
new file mode 100644
index 0000000..9d6feee
--- /dev/null
+++ b/tests/mocks/libraries/session.php
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * Mock library to add testing features to Session driver library
+ */
+class Mock_Libraries_Session extends CI_Session {
+	/**
+	 * Simulate new page load
+	 */
+	public function reload()
+	{
+		$this->_flashdata_sweep();
+		$this->_flashdata_mark();
+		$this->_tempdata_sweep();
+	}
+}
+
+/**
+ * Mock cookie driver to overload cookie setting
+ */
+class Mock_Libraries_Session_cookie extends CI_Session_cookie {
+	/**
+	 * Overload _setcookie to manage $_COOKIE values, since actual cookies can't be set in unit testing
+	 */
+	protected function _setcookie($name, $value = '', $expire = 0, $path = '', $domain = '', $secure = false,
+	$httponly = false)
+	{
+		if (empty($value) || $expire <= time()) {
+			// Clear cookie
+			unset($_COOKIE[$name]);
+		}
+		else {
+			// Set cookie
+			$_COOKIE[$name] = $value;
+		}
+	}
+}
+
+/**
+ * Mock native driver (just for consistency in loading)
+ */
+class Mock_Libraries_Session_native extends CI_Session_native { }
+
diff --git a/tests/mocks/libraries/upload.php b/tests/mocks/libraries/upload.php
new file mode 100644
index 0000000..988723e
--- /dev/null
+++ b/tests/mocks/libraries/upload.php
@@ -0,0 +1,3 @@
+<?php
+
+class Mock_Libraries_Upload extends CI_Upload {}
\ No newline at end of file
diff --git a/tests/mocks/uploads/ci_logo.gif b/tests/mocks/uploads/ci_logo.gif
new file mode 100644
index 0000000..073ec14
--- /dev/null
+++ b/tests/mocks/uploads/ci_logo.gif
Binary files differ
diff --git a/tests/travis/mysql.phpunit.xml b/tests/travis/mysql.phpunit.xml
index 38c8eba..06d4a01 100644
--- a/tests/travis/mysql.phpunit.xml
+++ b/tests/travis/mysql.phpunit.xml
@@ -18,7 +18,7 @@
 		</testsuite>
 	</testsuites>
 	<filter>
-        <whitelist addUncoveredFilesFromWhitelist="true">
+        <whitelist addUncoveredFilesFromWhitelist="false">
             <directory suffix=".php">../../system</directory>
         </whitelist>
 	</filter>
diff --git a/tests/travis/pdo/mysql.phpunit.xml b/tests/travis/pdo/mysql.phpunit.xml
index c3113a6..7121edc 100644
--- a/tests/travis/pdo/mysql.phpunit.xml
+++ b/tests/travis/pdo/mysql.phpunit.xml
@@ -18,7 +18,7 @@
 		</testsuite>
 	</testsuites>
 	<filter>
-        <whitelist addUncoveredFilesFromWhitelist="true">
+        <whitelist addUncoveredFilesFromWhitelist="false">
             <directory suffix=".php">../../../system</directory>
         </whitelist>
 	</filter>
diff --git a/tests/travis/pdo/pgsql.phpunit.xml b/tests/travis/pdo/pgsql.phpunit.xml
index 2320255..df3ff98 100644
--- a/tests/travis/pdo/pgsql.phpunit.xml
+++ b/tests/travis/pdo/pgsql.phpunit.xml
@@ -18,7 +18,7 @@
 		</testsuite>
 	</testsuites>
 	<filter>
-        <whitelist addUncoveredFilesFromWhitelist="true">
+        <whitelist addUncoveredFilesFromWhitelist="false">
             <directory suffix=".php">../../../system</directory>
         </whitelist>
 	</filter>
diff --git a/tests/travis/pdo/sqlite.phpunit.xml b/tests/travis/pdo/sqlite.phpunit.xml
index 3d12567..7d867f6 100644
--- a/tests/travis/pdo/sqlite.phpunit.xml
+++ b/tests/travis/pdo/sqlite.phpunit.xml
@@ -18,7 +18,7 @@
 		</testsuite>
 	</testsuites>
 	<filter>
-        <whitelist addUncoveredFilesFromWhitelist="true">
+        <whitelist addUncoveredFilesFromWhitelist="false">
             <directory suffix=".php">../../../system</directory>
         </whitelist>
 	</filter>
diff --git a/tests/travis/pgsql.phpunit.xml b/tests/travis/pgsql.phpunit.xml
index 51e433d..bfddbf6 100644
--- a/tests/travis/pgsql.phpunit.xml
+++ b/tests/travis/pgsql.phpunit.xml
@@ -18,7 +18,7 @@
 		</testsuite>
 	</testsuites>
 	<filter>
-        <whitelist addUncoveredFilesFromWhitelist="true">
+        <whitelist addUncoveredFilesFromWhitelist="false">
             <directory suffix=".php">../../system</directory>
         </whitelist>
 	</filter>
diff --git a/tests/travis/sqlite.phpunit.xml b/tests/travis/sqlite.phpunit.xml
index 7011657..75c946a 100644
--- a/tests/travis/sqlite.phpunit.xml
+++ b/tests/travis/sqlite.phpunit.xml
@@ -18,7 +18,7 @@
 		</testsuite>
 	</testsuites>
 	<filter>
-        <whitelist addUncoveredFilesFromWhitelist="true">
+        <whitelist addUncoveredFilesFromWhitelist="false">
             <directory suffix=".php">../../system</directory>
         </whitelist>
 	</filter>
diff --git a/user_guide_src/source/DCO.rst b/user_guide_src/source/DCO.rst
new file mode 100644
index 0000000..c8f9b49
--- /dev/null
+++ b/user_guide_src/source/DCO.rst
@@ -0,0 +1,27 @@
+#####################################
+Developer's Certificate of Origin 1.1
+#####################################
+
+By making a contribution to this project, I certify that:
+
+(1)	The contribution was created in whole or in part by me and I
+	have the right to submit it under the open source license
+	indicated in the file; or
+
+(2)	The contribution is based upon previous work that, to the best
+	of my knowledge, is covered under an appropriate open source
+	license and I have the right under that license to submit that
+	work with modifications, whether created in whole or in part
+	by me, under the same open source license (unless I am
+	permitted to submit under a different license), as indicated
+	in the file; or
+
+(3)	The contribution was provided directly to me by some other
+	person who certified (1), (2) or (3) and I have not modified
+	it.
+
+(4)	I understand and agree that this project and the contribution
+	are public and that a record of the contribution (including all
+	personal information I submit with it, including my sign-off) is
+	maintained indefinitely and may be redistributed consistent with
+	this project or the open source license(s) involved.
diff --git a/user_guide_src/source/_themes/eldocs/layout.html b/user_guide_src/source/_themes/eldocs/layout.html
index 4b1a022..51d61b8 100644
--- a/user_guide_src/source/_themes/eldocs/layout.html
+++ b/user_guide_src/source/_themes/eldocs/layout.html
@@ -9,6 +9,9 @@
 {%- if project == 'ExpressionEngine' %}{% set project_abbreviation = 'ee' %}{% set project_domain = 'expressionengine.com' %}{% endif -%}
 {%- if project == 'CodeIgniter' %}{% set project_abbreviation = 'ci' %}{% set project_domain = 'codeigniter.com' %}{% endif -%}
 {%- if project == 'MojoMotor' %}{% set project_abbreviation = 'mm' %}{% set project_domain = 'mojomotor.com' %}{% endif -%}
+{%- set exclude_comments = ['index', 'license', 'changelog',
+							'development/index', 'development/extension_hooks/index',
+							'development/guidelines/template'] %}
 
 <html>
 	<head>
@@ -85,36 +88,29 @@
 		<div id="brand" class="{{ project_abbreviation }}">
 			<a href="http://{{ project_domain }}/"><img src="{{ pathto('_static/asset/img/' + project_abbreviation + '-logo.gif', 1) }}" alt="{{ project }}"></a>
 			<p>{{ release }} User Guide</p>
-			{%- if show_source and has_source and sourcename %}
-		    <p><a href="{{ pathto('_sources/' + sourcename, true)|e }}"
-			           rel="nofollow">{{ _('Show Source') }}</a></p>
-			{%- endif %}
 		</div><!-- /#brand -->
 
 		<div id="header">
-			<form method="get" action="http://www.google.com/search">
-				<fieldset>
-					<input type="text" name="q" id="q" value="">
-					<input type="hidden" name="as_sitesearch" id="as_sitesearch" value="{{ project_domain }}/user_guide/" />
-					<input class="grades" type="submit" value="search">
-				</fieldset>
-			</form>
+            {%- include "searchbox.html" %}
 			<ul>
 				{%- block rootrellink %}
-				<li><a href="{{ pathto(master_doc) }}">Home</a>&nbsp;&nbsp;{{ reldelim1 }}</li>
-				<li><a id="toc-link" href="{{ pathto(master_doc) }}">Table of Contents</a>&nbsp;&nbsp;{{ reldelim1 }}</li>
+				<li><a href="{{ pathto(master_doc) }}">User Guide Home</a>{%- if pagename != 'index' %}&nbsp;&nbsp;{{ reldelim1 }}{%- endif %}</li>
 				{%- endblock %}
 				
 				{%- for parent in parents %}
 				<li><a href="{{ parent.link|e }}" {% if loop.last %}{{ accesskey("U") }}{% endif %}>{{ parent.title }}</a>&nbsp;&nbsp; {{ reldelim1 }}</li>
 		        {%- endfor %}
 
+				{%- if pagename != 'index' %}
 				<li><strong>{{ title }}</strong></li>
+				{%- endif %}
 			</ul>
 		</div><!-- /#header -->
 
-		<div class="section" id="content">
+		<div class="section body" id="content">
+			{%- block body %}
 			{{ body }}
+			{%- endblock %}
 		</div>
 	{%- endblock %}
 
@@ -124,49 +120,9 @@
 	
 	{%- block footer %}			
 		<div id="footer">
-			<p class="top">
-				{% if prev %}
-				<span class="prev">Previous Topic: <a href="{{ prev.link }}">{{ prev.title }}</a></span>
-				{% endif %}
-				{% if next %}
-				<span class="next">Next Topic: <a href="{{ next.link }}">{{ next.title }}</a></span>
-				{% endif %}
-				<a href="#header" title="Return to top">Return to top</a>
-			</p>
-			<p><a href="{{ project_url }}">{{ project }}</a> &ndash; Copyright &copy; {{ copyright }}</a> &ndash; Last updated: {{ last_updated }}</p>
+			<p class="top"><a href="#header" title="Return to top">Return to top</a></p>
+			<p><a href="http://{{ project_domain }}/">{{ project }}</a> &ndash; Copyright &copy; {{ copyright }}</a></p>
 		</div><!-- /#footer -->
 	{%- endblock %}
-	
-	<script src="{{ pathto('_static/asset/js/jquery-ui-min.js', 1) }}" type="text/javascript" charset="utf-8" async></script>
-	<script type="text/javascript" charset="utf-8">
-		$('#toc-link').click(function(){
-			$('#table-contents').animate({ left: '0' },1000);
-			return false;
-		});
-		$('html').click(function(){
-			if ($('#table-contents').css("left") == '0px'){
-				$('#table-contents').animate({ left: '-520' },1000);
-			}
-		});
-		$('#table-contents').click(function(event){
-			event.stopPropagation();
-		});
-/*		$('*:not(#table-contents,#toc-link)').click(function(){
-			if ($('#table-contents').css("left") == '0px'){
-				$('#table-contents').animate({ left: '-520' },1000);
-			}
-		});
-/*		$("#toc-link").click(function () {
-			$('#table-contents').show("slide", { direction: "left" }, 100);
-			event.stopPropagation();
-			return false;
-		});
-		$('*:not(#table-contents,#toc-link)').click(function () {
-			if ($('#table-contents').is(":visible")) {
-				$('#table-contents').hide("slide", { direction: "left" }, 100);
-				event.stopPropagation();	
-			}
-		}); */
-	</script>
 	</body>
 </html>
\ No newline at end of file
diff --git a/user_guide_src/source/_themes/eldocs/searchbox.html b/user_guide_src/source/_themes/eldocs/searchbox.html
new file mode 100644
index 0000000..039590b
--- /dev/null
+++ b/user_guide_src/source/_themes/eldocs/searchbox.html
@@ -0,0 +1,21 @@
+<!--
+	--------------------------------
+	Original Google search box block
+	--------------------------------
+	
+<form method="get" action="http://www.google.com/search">
+	<fieldset>
+		<input type="text" name="q" id="q" value="">
+		<input type="hidden" name="as_sitesearch" id="as_sitesearch" value="{{ project_domain }}/user_guide/" />
+		<input class="grades" type="submit" value="search">
+	</fieldset>
+</form>
+-->
+
+
+<form class="search" action="{{ pathto('search') }}" method="get">
+  <input type="text" name="q" id="q" value="" />
+  <input type="submit" value="search" />
+  <input type="hidden" name="check_keywords" value="yes" />
+  <input type="hidden" name="area" value="default" />
+</form>
diff --git a/user_guide_src/source/_themes/eldocs/static/asset/css/common.css b/user_guide_src/source/_themes/eldocs/static/asset/css/common.css
index 66768ba..0a63871 100644
--- a/user_guide_src/source/_themes/eldocs/static/asset/css/common.css
+++ b/user_guide_src/source/_themes/eldocs/static/asset/css/common.css
@@ -49,7 +49,9 @@
 
 h1{ font-size: 28px; }
 
-h2{ font-size: 24px; }
+h2{ font-size: 24px; font-weight: normal; }
+
+h1, h2, h3, h4, h5, h6{ margin-bottom: 20px; }
 
 h2, h3{ border-bottom: 2px solid #EEEEEE; padding: 0 0 3px; }	
 
@@ -73,6 +75,10 @@
 	li > ol{ margin: 0; margin-left: 40px; }
 
 	dl > dd{ margin-left: 20px; }
+	
+	li > p { margin: 0; }
+
+#expressionengine-user-guide li em { font-style: normal; }
 
 p, li, dd, dt, pre{ line-height: 1.5; }
 
@@ -141,39 +147,35 @@
 fieldset{ border: 0; }
 
 .top{ float: right; }
-.next{ padding: 0 20px 0 10px; }
-.prev{ padding-right: 10px; }
 
-.highlight-ci,
+.highlight{ overflow-x: auto; }
+
+.admonition,
 .highlight-ee,
+.highlight-ci,
 .highlight-rst,
 .highlight-bash,
 .highlight-perl,
+.highlight-php,
 .cp-path,
-.important,
-.note{ 
-	background-color: #F5FBFF; 
+.codeblock{ 
+	background-color: #F9FEFF; 
 	border: 1px solid #C8DEF0; 
-	margin: 20px 0 20px 20px; 
+	-moz-box-shadow: 4px 4px 0 rgba(0,0,0,0.03);
+	-webkit-box-shadow: 4px 4px 0 rgba(0,0,0,0.03);
+	box-shadow: 4px 4px 0 rgba(0,0,0,0.03);
+	margin: 20px 0; 
 	padding: 10px 10px 8px; 
 }
 
-	.highlight-ci,
-	.highlight-ee,
-	.highlight-rst,
-	.highlight-bash,
-	.highlight-perl{
-		-moz-box-shadow: 4px 4px 0 rgba(0,0,0,0.03);
-		-webkit-box-shadow: 4px 4px 0 rgba(0,0,0,0.03);
-		box-shadow: 4px 4px 0 rgba(0,0,0,0.03);
-	}
+.highlight-ci{ background-color: #FEFEFE; border-color: #E5E5E5; }
 
-	.cp-path{ background-color: #FFFDED; border-color: #D1CDB0; }
-	.important, .note{ background-color: #F2FFE8; border-color: #B9D3A6; }
-	.highlight-rst{ background-color: #F9FEFE; border-color: #AACFCF; }
+	.admonition p{ margin: 0; }
 	
-	.important p,
-	.note p{ margin: 0; }
+	.codeblock{ margin: 10px 0; }
+	
+	.cp-path{ background-color: #FAFFF6; border-color: #D1CDB0; }
+	.important, .note{ background-color: #FFFFF2; border-color: #C8C8A5; }
 	
 .admonition-title{ 
 	float: left;
@@ -183,6 +185,8 @@
 }
 
 .admonition-title:after{ content: ':  '; }
+
+.highlighted{ background-color: #FFF09B; }
 	
 #table-contents{
 	bottom: 0;
@@ -295,6 +299,43 @@
 
 	#footer p{ margin: 0; }
 
+#comments,
+#feedLink{ background: #FCFCFC; padding: 1px 40px 20px; }
+
+	#comments{ border-top: 1px solid #CCCCCC; }
+	#comments h3{ margin: 20px 0; }
+
+.comments td.avatar{ min-width: 100px; }
+
+.comments td.column1,
+.comments td.post{ background-color: #FFFFFF; padding: 10px; }
+
+.comments td.staffeven{ border-left: 10px solid #C8DEF0; }
+
+#comment_form p,
+.comments p{ margin: 0; }
+
+	.comments p{ margin-bottom: 10px; }
+
+#comment_form textarea{
+	-moz-box-sizing: border-box;
+	-webkit-box-sizing: border-box;
+	box-sizing: border-box;
+	margin-bottom: 10px;
+	resize: none; 
+	width: 100%; 
+}
+
+#comment_form input[type="submit"]{ margin-top: 10px; }
+
+	#comment_form textarea:focus{ background-color: #FFFFF2; border: 1px solid #666666; outline: 0; }
+
+	#commentFormInstructions{ font-size: 12px; margin: 20px 0; }
+
+	#feedLink a{ font-size: 16px; }
+
+	#feedLink a img{ float: left; margin-right: 5px; }
+
 @media (max-width:800px){
 	#footer .top,
 	#header form{ float: none; margin-bottom: 10px; }
@@ -310,4 +351,4 @@
 
 @media screen and (-webkit-min-device-pixel-ratio:0){
 	#header input[type="submit"]{ padding-bottom: 7px; }
-}
\ No newline at end of file
+}
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 4f5915d..c5a9353 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -22,7 +22,7 @@
    -  ``$_SERVER['CI_ENV']`` can now be set to control the ``ENVIRONMENT`` constant.
    -  Added an optional backtrace to php-error template.
    -  Added Android to the list of user agents.
-   -  Added Windows 7, Android, Blackberry and iOS to the list of user platforms.
+   -  Added Windows 7, Windows 8, Android, Blackberry, iOS and PlayStation 3 to the list of user platforms.
    -  Added Fennec (Firefox for mobile) to the list of mobile user agents.
    -  Ability to log certain error types, not all under a threshold.
    -  Added support for pem, p10, p12, p7a, p7c, p7m, p7r, p7s, crt, crl, der, kdb, rsa, cer, sst, csr Certs to mimes.php.
@@ -34,8 +34,10 @@
    -  Added support for rar archives to mimes.php.
    -  Updated support for xml ('application/xml') and xsl ('application/xml', 'text/xsl') files in mimes.php.
    -  Updated support for doc files in mimes.php.
+   -  Updated support for docx files in mimes.php.
    -  Updated support for php files in mimes.php.
    -  Updated support for zip files in mimes.php.
+   -  Updated support for csv files in mimes.php.
    -  Added some more doctypes.
    -  Added Romanian and Greek characters in foreign_characters.php.
    -  Changed logger to only chmod when file is first created.
@@ -48,20 +50,28 @@
    -  Global config files are loaded first, then environment ones. Environment config keys overwrite base ones, allowing to only set the keys we want changed per environment.
    -  Changed detection of ``$view_folder`` so that if it's not found in the current path, it will now also be searched for under the application folder.
    -  Path constants BASEPATH, APPPATH and VIEWPATH are now (internally) defined as absolute paths.
+   -  Updated email validation methods to use ``filter_var()`` instead of PCRE.
+   -  Changed environment defaults to report all errors in *development* and only fatal ones in *testing*, *production* but only display them in *development*.
+   -  Updated *ip_address* database field lengths from 16 to 45 for supporting IPv6 address on :doc:`Trackback Library <libraries/trackback>` and :doc:`Captcha Helper <helpers/captcha_helper>`.
 
 -  Helpers
 
-   -  :doc:`Date Helper <helpers/date_helper>` function now() now works with all timezone strings supported by PHP.
+   -  :doc:`Date Helper <helpers/date_helper>` changes include:
+	 - ``now()`` now works with all timezone strings supported by PHP.
+	 - Added an optional third parameter to ``timespan()`` that constrains the number of time units displayed.
+	 - Added an optional parameter to ``timezone_menu()`` that allows more attributes to be added to the generated select tag.
+	 - Deprecated ``standard_date()``, which now just uses the native ``date()`` with `DateTime constants <http://bg2.php.net/manual/en/class.datetime.php#datetime.constants.types>`_.
    -  ``create_captcha()`` accepts additional colors parameter, allowing for color customization.
    -  :doc:`URL Helper <helpers/url_helper>` changes include:
 	 - ``url_title()`` will now trim extra dashes from beginning and end.
 	 - ``anchor_popup()`` will now fill the "href" attribute with the URL and its JS code will return false instead.
 	 - Added JS window name support to ``anchor_popup()`` function.
+	 - Added support (auto-detection) for HTTP/1.1 response code 303 in ``redirect()``.
+	 - "auto" method in ``redirect()`` now chooses the "refresh" method only on IIS servers, instead of all servers on Windows.
    -  Added XHTML Basic 1.1 doctype to :doc:`HTML Helper <helpers/html_helper>`.
    -  Changed ``humanize()`` to include a second param for the separator.
    -  Refactored ``plural()`` and ``singular()`` to avoid double pluralization and support more words.
    -  Added an optional third parameter to ``force_download()`` that enables/disables sending the actual file MIME type in the Content-Type header (disabled by default).
-   -  Added an optional third parameter to ``timespan()`` that constrains the number of time units displayed.
    -  Added a work-around in ``force_download()`` for a bug Android <= 2.1, where the filename extension needs to be in uppercase.
    -  ``form_dropdown()`` will now also take an array for unity with other form helpers.
    -  ``do_hash()`` now uses PHP's native ``hash()`` function (supporting more algorithms) and is deprecated.
@@ -70,7 +80,7 @@
 	 - ``set_realpath()`` can now also handle file paths as opposed to just directories.
 	 - Added an optional paramater to ``delete_files()`` to enable it to skip deleting files such as .htaccess and index.html.
 	 - ``read_file()`` is now a deprecated alias of ``file_get_contents()``.
-   -  :doc:`Date Helper <helpers/date_helper>` Added optional fourth parameter to ``timezone_menu()`` that allows more attributes to be added to the generated select tag
+   -  :doc:`Security Helper <helpers/security_helper>` function ``strip_image_tags()`` is now an alias for the same method in the :doc:`Security Library <libraries/security>`.
 
 -  Database
 
@@ -90,17 +100,18 @@
 	 - Added support for backup() in :doc:`Database Utilities <database/utilities>`.
    -  Added 'dsn' configuration setting for drivers that support DSN strings (PDO, PostgreSQL, Oracle, ODBC, CUBRID).
    -  Improved PDO database support.
-   -  Added Interbase/Firebird database support via the "interbase" driver.
+   -  Added Interbase/Firebird database support via the 'ibase' driver.
    -  Added an optional database name parameter to db_select().
    -  Replaced the _error_message() and _error_number() methods with error(), that returns an array containing the last database error code and message.
    -  Improved version() implementation so that drivers that have a native function to get the version number don't have to be defined in the core DB_driver class.
    -  Improved support of the PostgreSQL driver, including:
-	 - pg_version() is now used to get the database version number, when possible.
-	 - Added db_set_charset() support.
-	 - Added support for optimize_table() in :doc:`Database Utilities <database/utilities>` (rebuilds table indexes).
-	 - Added boolean data type support in escape().
-	 - Added update_batch() support.
-	 - Removed limit() and order_by() support for UPDATE and DELETE queries in as PostgreSQL does not support those features.
+	 - ``pg_version()`` is now used to get the database version number, when possible.
+	 - Added ``db_set_charset()`` support.
+	 - Added support for ``optimize_table()`` in :doc:`Database Utilities <database/utilities>` (rebuilds table indexes).
+	 - Added boolean data type support in ``escape()``.
+	 - Added ``update_batch()`` support.
+	 - Removed ``limit()`` and ``order_by()`` support for UPDATE and DELETE queries as PostgreSQL does not support those features.
+	 - Added a work-around for dead persistent connections to be re-created after a database restart.
    -  Added a constructor to the DB_result class and moved all driver-specific properties and logic out of the base DB_driver class to allow better abstraction.
    -  Removed protect_identifiers() and renamed internal method _protect_identifiers() to it instead - it was just an alias.
    -  Renamed internal method _escape_identifiers() to escape_identifiers().
@@ -123,7 +134,6 @@
 	 - Added support for drop_table() in :doc:`Database Forge <database/forge>`.
 	 - Added support for list_databases() in :doc:`Database Utilities <database/utilities>`.
 	 - Generally improved for speed and cleaned up all of its components.
-	 - *Row* result methods now really only fetch only the needed number of rows, instead of depending entirely on result().
 	 - num_rows() is now only called explicitly by the developer and no longer re-executes statements.
    -  Improved support of the SQLite driver, including:
 	 - Added support for replace() in :doc:`Query Builder <database/query_builder>`.
@@ -131,26 +141,42 @@
    -  Added ODBC support for create_database(), drop_database() and drop_table() in :doc:`Database Forge <database/forge>`.
    -  Added PDO support for create_database(), drop_database and drop_table() in :doc:`Database Forge <database/forge>`.
    -  Added unbuffered_row() method for getting a row without prefetching whole result (consume less memory).
+   -  Added PDO support for ``list_fields()`` in :doc:`Database Results <database/results>`.
+   -  Added capability for packages to hold database.php config files
+   -  Added subdrivers support (currently only used by PDO).
+   -  Added client compression support for MySQL and MySQLi.
+   -  Removed :doc:`Loader Class <libraries/loader>` from Database error tracing to better find the likely culprit.
 
 -  Libraries
 
-   -  Added max_filename_increment config setting for Upload library.
-   -  CI_Loader::_ci_autoloader() is now a protected method.
-   -  Added custom filename to Email::attach() as $this->email->attach($filename, $disposition, $newname).
-   -  Added possibility to send attachment as buffer string in Email::attach() as $this->email->attach($buffer, $disposition, $newname, $mime).
-   -  Added third parameter $return_path for method Email::from().
+   -  :doc:`Session Library <libraries/sessions>` changes include:
+	 -  Library changed to :doc:`Driver <general/drivers>` with classic Cookie driver as default.
+	 -  Added Native PHP Session driver to work with $_SESSION.
+	 -  Custom session drivers can be added anywhere in package paths and loaded with Session library.
+	 -  Session drivers interchangeable on the fly.
+	 -  New tempdata feature allows setting user data items with an expiration time.
+	 -  Added default $config['sess_driver'] and $config['sess_valid_drivers'] items to config.php file.
+	 -  Cookie driver now respects php.ini's session.gc_probability and session.gc_divisor
+	 -  Changed the Cookie driver to select only one row when using database sessions.
+	 -  Cookie driver now only writes to database at end of request when using database.
+	 -  Cookie driver now uses PHP functions for faster array manipulation when using database.
+	 -  Added ``all_flashdata()`` method to session class. Returns an associative array of only flashdata.
+	 -  Added ``has_userdata()`` method to verify existence of userdata item.
+	 -  Added ``tempdata()``, ``set_tempdata()``, and ``unset_tempdata()`` methods for manipulating tempdata.
+   -  :doc:`File Uploading Library <libraries/upload>` changes include:
+	 -  Added *max_filename_increment* config setting.
+	 -  Added an "index" parameter to the ``data()`` method.
    -  :doc:`Cart library <libraries/cart>` changes include:
 	 -  It now auto-increments quantity's instead of just resetting it, this is the default behaviour of large e-commerce sites.
 	 -  Product Name strictness can be disabled via the Cart Library by switching "$product_name_safe".
 	 -  Added function remove() to remove a cart item, updating with quantity of 0 seemed like a hack but has remained to retain compatibility.
    -  :doc:`Image Manipulation library <libraries/image_lib>` changes include:
 	 -  The initialize() method now only sets existing class properties.
-	 -  Added support for 3-length hex color values for wm_font_color and wm_shadow_color properties, as well as validation for them.
-	 -  Class properties wm_font_color, wm_shadow_color and wm_use_drop_shadow are now protected, to avoid breaking the text_watermark() method if they are set manually after initialization.
-	 -  If property maintain_ratio is set to TRUE, image_reproportion() now doesn't need both width and height to be specified.
-   -  Removed SHA1 function in the :doc:`Encryption Library <libraries/encryption>`.
-   -  Added $config['csrf_regeneration'] to the CSRF protection in the :doc:`Security library <libraries/security>`, which makes token regeneration optional.
-   -  Added $config['csrf_exclude_uris'] to the CSRF protection in the :doc:`Security library <libraries/security>`, which allows you list URIs which will not have the CSRF validation functions run.
+	 -  Added support for 3-length hex color values for *wm_font_color* and *wm_shadow_color* properties, as well as validation for them.
+	 -  Class properties *wm_font_color*, *wm_shadow_color* and *wm_use_drop_shadow* are now protected, to avoid breaking the ``text_watermark()`` method if they are set manually after initialization.
+	 -  If property *maintain_ratio* is set to TRUE, ``image_reproportion()`` now doesn't need both width and height to be specified.
+	 -  Property *maintain_ratio* is now taken into account when resizing images using ImageMagick library.
+	 -  Added support for maintaining transparency for PNG images in method ``text_watermark()``.
    -  :doc:`Form Validation library <libraries/form_validation>` changes include:
 	 -  Added method error_array() to return all error messages as an array.
 	 -  Added method set_data() to set an alternative data array to be validated instead of the default $_POST.
@@ -160,37 +186,57 @@
 	 -  Removed method is_numeric() as it exists as a native PHP function and _execute() will find and use that (the 'is_numeric' rule itself is deprecated since 1.6.1).
 	 -  Native PHP functions used as rules can now accept an additional parameter, other than the data itself.
 	 -  Updated set_rules() to accept an array of rules as well as a string.
-   -  Changed the :doc:`Session Library <libraries/sessions>` to select only one row when using database sessions.
-   -  Added all_flashdata() method to session class. Returns an associative array of only flashdata.
-   -  Allowed for setting table class defaults in a config file.
+	 -  Fields that have empty rules set no longer run through validation (and therefore are not considered erroneous).
+   -  Added support for setting :doc:`Table <libraries/table>` class defaults in a config file.
    -  Added a Wincache driver to the :doc:`Caching Library <libraries/caching>`.
    -  Added a Redis driver to the :doc:`Caching Library <libraries/caching>`.
-   -  Added dsn (delivery status notification) option to the :doc:`Email Library <libraries/email>`.
-   -  Renamed method _set_header() to set_header() and made it public to enable adding custom headers in the :doc:`Email Library <libraries/email>`.
-   -  Added an "index" parameter to the data() method in the :doc:`Upload Library <libraries/file_uploading>`.
+   -  :doc:`Email library <libraries/email>` changes include:
+	 -  Added custom filename to ``Email::attach()`` as ``$this->email->attach($filename, $disposition, $newname)``.
+	 -  Added possibility to send attachment as buffer string in ``Email::attach()`` as ``$this->email->attach($buffer, $disposition, $newname, $mime)``.
+	 -  Added dsn (delivery status notification) option.
+	 -  Renamed method _set_header() to set_header() and made it public to enable adding custom headers in the :doc:`Email Library <libraries/email>`.
+	 -  Successfully sent emails will automatically clear the parameters.
+	 -  Added third parameter $return_path in method Email::from().
    -  :doc:`Pagination Library <libraries/pagination>` changes include:
 	 -  Added support for the anchor "rel" attribute.
 	 -  Added support for setting custom attributes.
 	 -  Deprecated usage of the "anchor_class" setting (use the new "attributes" setting instead).
 	 -  Added $config['reuse_query_string'] to allow automatic repopulation of query string arguments, combined with normal URI segments.
+   -  Removed the default ``&nbsp;`` from a number of the configuration variables.
+   -  Added the ability to use a proxy with the :doc:`XML-RPC Library <libraries/xmlrpc>`.
+   -  :doc:`Encryption Library <libraries/encrypt>` changes include:
+	 -  Added support for hashing algorithms other than SHA1 and MD5.
+	 -  Removed previously deprecated ``sha1()`` method.
 
 -  Core
 
    -  Changed private methods in the :doc:`URI Library <libraries/uri>` to protected so MY_URI can override them.
-   -  Removed CI_CORE boolean constant from CodeIgniter.php (no longer Reactor and Core versions).
-   -  Added method get_vars() to the :doc:`Loader Library <libraries/loader>` to retrieve all variables loaded with $this->load->vars().
-   -  is_loaded() function from system/core/Commons.php now returns a reference.
+   -  Removed ``CI_CORE`` boolean constant from CodeIgniter.php (no longer Reactor and Core versions).
+   -  :doc:`Loader Library <libraries/loader>` changes include:
+	 -  Added method get_vars() to the Loader to retrieve all variables loaded with $this->load->vars().
+	 -  CI_Loader::_ci_autoloader() is now a protected method.
+	 -  Added autoloading of drivers with $autoload['drivers'].
+	 -  CI_Loader::library() will now load drivers as well, for backward compatibility of converted libraries (like Session).
+   -  ``is_loaded()`` function from *system/core/Commons.php* now returns a reference.
    -  $config['rewrite_short_tags'] now has no effect when using PHP 5.4 as *<?=* will always be available.
-   -  Added method() to the :doc:`Input Library <libraries/input>` to retrieve $_SERVER['REQUEST_METHOD'].
+   -  Added ``method()`` to the :doc:`Input Library <libraries/input>` to retrieve ``$_SERVER['REQUEST_METHOD']``.
    -  Modified valid_ip() to use PHP's filter_var() in the :doc:`Input Library <libraries/input>`.
-   -  Added support for HTTP-Only cookies with new config option ``cookie_httponly`` (default FALSE).
+   -  Added support for HTTP-Only cookies with new config option *cookie_httponly* (default FALSE).
    -  Renamed method _call_hook() to call_hook() in the :doc:`Hooks Library <general/hooks>`.
-   -  Added get_content_type() method to the :doc:`Output Library <libraries/output>`.
-   -  Added get_mimes() function to system/core/Commons.php to return the config/mimes.php array.
-   -  Added a second argument to set_content_type() in the :doc:`Output Library <libraries/output>` that allows setting the document charset as well.
-   -  $config['time_reference'] now supports all timezone strings supported by PHP.
-   -  Added support for HTTP code 303 ("See Other") in set_status_header().
-   -  Changed :doc:`Config Library <libraries/config>` method site_url() to accept an array as well.
+   -  :doc:`Output Library <libraries/output>` changes include:
+	 -  Added method ``get_content_type()``.
+	 -  Added a second argument to method ``set_content_type()`` that allows setting the document charset as well.
+   -  Added ``get_mimes()`` function to *system/core/Commons.php* to return the *config/mimes.php* array.
+   -  ``$config['time_reference']`` now supports all timezone strings supported by PHP.
+   -  Added support for HTTP code 303 ("See Other") in ``set_status_header()``.
+   -  Changed :doc:`Config Library <libraries/config>` method ``site_url()`` to accept an array as well.
+   -  :doc:`Security Library <libraries/security>` changes include:
+	 -  Added method ``strip_image_tags()``.
+	 -  Added ``$config['csrf_regeneration']``, which makes token regeneration optional.
+	 -  Added ``$config['csrf_exclude_uris']``, which allows you list URIs which will not have the CSRF validation methods run.
+   -  Changed ``_exception_handler()`` to respect php.ini 'display_errors' setting.
+   -  Removed redundant conditional to determine HTTP server protocol in ``set_status_header()``.
+   -  Added support for IPv4 range masks (e.g. 192.168.1.1/24) to specify ranges of IP addresses for use with the *proxy_ips* setting.
 
 Bug fixes for 3.0
 ------------------
@@ -274,12 +320,12 @@
 -  Fixed a bug (#666) - :doc:`Output library <libraries/output>`'s set_content_type() method didn't set the document charset.
 -  Fixed a bug (#784, #861) - :doc:`Database Forge <database/forge>` method ``create_table()`` used to accept constraints for MSSQL/SQLSRV integer-type columns.
 -  Fixed a bug (#706) - SQLSRV/MSSSQL didn't escape field names.
--  Fixed a bug (#1452) - protect_identifiers() didn't properly detect identifiers with spaces in their names.
--  Fixed a bug where protect_identifiers() ignored it's extra arguments when the value passed to it is an array.
--  Fixed a bug where _has_operator() didn't detect BETWEEN.
--  Fixed a bug in :doc:`Query Builder <database/query_builder>`'s join() method where it failed with identifiers containing dashes.
+-  Fixed a bug (#1452) - ``protect_identifiers()`` didn't properly detect identifiers with spaces in their names.
+-  Fixed a bug where ``protect_identifiers()`` ignored it's extra arguments when the value passed to it is an array.
+-  Fixed a bug where ``_has_operator()`` didn't detect BETWEEN.
+-  Fixed a bug in :doc:`Query Builder <database/query_builder>`'s ``join()`` method where it failed with identifiers containing dashes.
 -  Fixed a bug (#1264) - :doc:`Database Forge <database/forge>` and :doc:`Database Utilities <database/utilities>` didn't update/reset the databases and tables list cache when a table or a database is created, dropped or renamed.
--  Fixed a bug (#7) - :doc:`Query Builder <database/query_builder>`'s join() method only escaped one set of conditions.
+-  Fixed a bug (#7) - :doc:`Query Builder <database/query_builder>`'s ``join()`` method only escaped one set of conditions.
 -  Fixed a bug (#1321) - Core Exceptions class couldn't find the errors/ folder in some cases.
 -  Fixed a bug in the File-based :doc:`Cache Library <libraries/caching>` driver's get_metadata() method where a non-existent array key was accessed for the TTL value.
 -  Fixed a bug (#1202) - :doc:`Encryption Library <libraries/encryption>` encode_from_legacy() didn't set back the encrypt mode on failure.
@@ -295,11 +341,31 @@
 -  Fixed a bug where :doc:`URL Helper <helpers/url_helper>` function anchor_popup() ignored the attributes argument if it is not an array.
 -  Fixed a bug (#1328) - :doc:`Form Validation Library <libraries/form_validation>` didn't properly check the type of the form fields before processing them.
 -  Fixed a bug (#79) - :doc:`Form Validation Library <libraries/form_validation>` didn't properly validate array fields that use associative keys or have custom indexes.
+-  Fixed a bug (#427) - :doc:`Form Validation Library <libraries/form_validation>` method ``strip_image_tags()`` was an alias to a non-existent method.
+-  Fixed a bug (#1545) - :doc:`Query Builder <database/query_builder>` method ``limit()`` wasn't executed properly under Oracle.
+-  Fixed a bug (#1551) - :doc:`Date Helper <helpers/date_helper>` function ``standard_date()`` didn't properly format *W3C* and *ATOM* standard dates.
+-  Fixed a bug in :doc:`Query Builder <database/query_builder>` method join() where literal values were escaped as if they were fields.
+-  Fixed a bug (#135) - PHP Error logging was impossible without the errors being displayed.
+-  Fixed a bug (#1613) - :doc:`Form Helper <helpers/form_helper>` functions ``form_multiselect()``, ``form_dropdown()`` didn't properly handle empty array option groups.
+-  Fixed a bug (#1605) - :doc:`Pagination Library <libraries/pagination>` produced incorrect *previous* and *next* link values.
+-  Fixed a bug in SQLSRV's ``affected_rows()`` method where an erroneous function name was used.
+-  Fixed a bug (#1000) - Change syntax of ``$view_file`` to ``$_ci_view_file`` to prevent being overwritten by application.
+-  Fixed a bug (#1757) - :doc:`Directory Helper <helpers/directory_helper>` function ``directory_map()`` was skipping files and directories named *0*.
+-  Fixed a bug (#1789) - :doc:`Database Library <libraries/database>` method ``escape_str()`` escaped quote characters in LIKE conditions twice under MySQL.
+-  Fixed a bug (#395)  - :doc:`Unit Testing Library <libraries/unit_testing>` method ``result()`` didn't properly check array result columns when called from ``report()``.
+
+Version 2.1.2
+=============
+
+Release Date: June 29, 2012
+
+-  General Changes
+   -  Improved security in ``xss_clean()``.
 
 Version 2.1.1
 =============
 
-Release Date: June 13, 2012
+Release Date: June 12, 2012
 
 -  General Changes
    -  Fixed support for docx, xlsx files in mimes.php.
@@ -310,20 +376,20 @@
    -  Added support for the IP format parameter to the :doc:`Form Validation Library <libraries/form_validation>`.
 
 -  Helpers
-   -  url_title() performance and output improved. You can now use any string as the word delimiter, but 'dash' and 'underscore' are still supported.
+   -  ``url_title()`` performance and output improved. You can now use any string as the word delimiter, but 'dash' and 'underscore' are still supported.
 
 Bug fixes for 2.1.1
 -------------------
 
--  Fixed a bug (#697) - A wrong array key was used in the Upload library to check for mime-types.
--  Fixed a bug - form_open() compared $action against site_url() instead of base_url().
--  Fixed a bug - CI_Upload::_file_mime_type() could've failed if mime_content_type() is used for the detection and returns FALSE.
+-  Fixed a bug (#697) - A wrong array key was used in the :doc:`File Uploading Library <libraries/file_uploading>` to check for mime-types.
+-  Fixed a bug - ``form_open()`` compared $action against ``site_url()`` instead of ``base_url()``.
+-  Fixed a bug - ``CI_Upload::_file_mime_type()`` could've failed if ``mime_content_type()`` is used for the detection and returns FALSE.
 -  Fixed a bug (#538) - Windows paths were ignored when using the :doc:`Image Manipulation Library <libraries/image_lib>` to create a new file.
 -  Fixed a bug - When database caching was enabled, $this->db->query() checked the cache before binding variables which resulted in cached queries never being found.
 -  Fixed a bug - CSRF cookie value was allowed to be any (non-empty) string before being written to the output, making code injection a risk.
 -  Fixed a bug (#726) - PDO put a 'dbname' argument in it's connection string regardless of the database platform in use, which made it impossible to use SQLite.
--  Fixed a bug - CI_DB_pdo_driver::num_rows() was not returning properly value with SELECT queries, cause it was relying on PDOStatement::rowCount().
--  Fixed a bug (#1059) - CI_Image_lib::clear() was not correctly clearing all necessary object properties, namely width and height.
+-  Fixed a bug - ``CI_DB_pdo_driver::num_rows()`` was not returning properly value with SELECT queries, cause it was relying on ``PDOStatement::rowCount()``.
+-  Fixed a bug (#1059) - ``CI_Image_lib::clear()`` was not correctly clearing all necessary object properties, namely width and height.
 
 Version 2.1.0
 =============
@@ -359,7 +425,7 @@
       injection.
    -  Added additional option 'none' for the optional third argument for
       $this->db->like() in the :doc:`Database
-      Driver <database/active_record>`.
+      Driver <database/query_builder>`.
    -  Added $this->db->insert_batch() support to the OCI8 (Oracle) driver.
    -  Added failover if the main connections in the config should fail
 
@@ -1633,27 +1699,27 @@
 -  Active Record
 
    -  Added protect_identifiers() in :doc:`Active
-      Record <./database/active_record>`.
+      Record <./database/query_builder>`.
    -  All AR queries are backticked if appropriate to the database.
    -  Added where_in(), or_where_in(), where_not_in(),
       or_where_not_in(), not_like() and or_not_like() to :doc:`Active
-      Record <./database/active_record>`.
+      Record <./database/query_builder>`.
    -  Added support for limit() into update() and delete() statements in
-      :doc:`Active Record <./database/active_record>`.
+      :doc:`Active Record <./database/query_builder>`.
    -  Added empty_table() and truncate_table() to :doc:`Active
-      Record <./database/active_record>`.
+      Record <./database/query_builder>`.
    -  Added the ability to pass an array of tables to the delete()
-      statement in :doc:`Active Record <./database/active_record>`.
+      statement in :doc:`Active Record <./database/query_builder>`.
    -  Added count_all_results() function to :doc:`Active
-      Record <./database/active_record>`.
+      Record <./database/query_builder>`.
    -  Added select_max(), select_min(), select_avg() and
-      select_sum() to :doc:`Active Record <./database/active_record>`.
+      select_sum() to :doc:`Active Record <./database/query_builder>`.
    -  Added the ability to use aliases with joins in :doc:`Active
-      Record <./database/active_record>`.
+      Record <./database/query_builder>`.
    -  Added a third parameter to Active Record's like() clause to
       control where the wildcard goes.
    -  Added a third parameter to set() in :doc:`Active
-      Record <./database/active_record>` that withholds escaping
+      Record <./database/query_builder>` that withholds escaping
       data.
    -  Changed the behaviour of variables submitted to the where() clause
       with no values to auto set "IS NULL"
@@ -1761,7 +1827,7 @@
       the table of contents of the userguide.
    -  Moved part of the userguide menu javascript to an external file.
    -  Documented distinct() in :doc:`Active
-      Record <./database/active_record>`.
+      Record <./database/query_builder>`.
    -  Documented the timezones() function in the :doc:`Date
       Helper <./helpers/date_helper>`.
    -  Documented unset_userdata in the :doc:`Session
@@ -2337,9 +2403,9 @@
    function <./general/views>`: $this->load->view('my_view',
    $object);
 -  Added getwhere function to :doc:`Active Record
-   class <./database/active_record>`.
+   class <./database/query_builder>`.
 -  Added count_all function to :doc:`Active Record
-   class <./database/active_record>`.
+   class <./database/query_builder>`.
 -  Added language file for scaffolding and fixed a scaffolding bug that
    occurs when there are no rows in the specified table.
 -  Added :doc:`$this->db->last_query() <./database/queries>`, which
@@ -2364,7 +2430,7 @@
 -  Added support for :doc:`Models <general/models>`.
 -  Redesigned the database libraries to support additional RDBMs
    (Postgres, MySQLi, etc.).
--  Redesigned the :doc:`Active Record class <./database/active_record>`
+-  Redesigned the :doc:`Active Record class <./database/query_builder>`
    to enable more varied types of queries with simpler syntax, and
    advanced features like JOINs.
 -  Added a feature to the database class that lets you run :doc:`custom
@@ -2397,7 +2463,7 @@
    whether PHP 4 or 5 is being run, since PHP 5 allows a more graceful
    way to manage objects that utilizes a bit less resources.
 -  Deprecated: $this->db->use_table() has been deprecated. Please read
-   the :doc:`Active Record <./database/active_record>` page for
+   the :doc:`Active Record <./database/query_builder>` page for
    information.
 -  Deprecated: $this->db->smart_escape_str() has been deprecated.
    Please use this instead: $this->db->escape()
diff --git a/user_guide_src/source/conf.py b/user_guide_src/source/conf.py
index e972a38..f68405b 100644
--- a/user_guide_src/source/conf.py
+++ b/user_guide_src/source/conf.py
@@ -167,6 +167,7 @@
 # Output file base name for HTML help builder.
 htmlhelp_basename = 'CodeIgniterdoc'
 
+html_copy_source = False
 
 # -- Options for LaTeX output --------------------------------------------------
 
diff --git a/user_guide_src/source/contributing/index.rst b/user_guide_src/source/contributing/index.rst
new file mode 100644
index 0000000..2ede0e6
--- /dev/null
+++ b/user_guide_src/source/contributing/index.rst
@@ -0,0 +1,105 @@
+###########################
+Contributing to CodeIgniter
+###########################
+
+CodeIgniter is a community driven project and accepts contributions of code
+and documentation from the community. These contributions are made in the form
+of Issues or `Pull Requests <http://help.github.com/send-pull-requests/>`_ on
+the `EllisLab CodeIgniter repository
+<https://github.com/EllisLab/CodeIgniter>`_ on GitHub.
+
+Issues are a quick way to point out a bug. If you find a bug or documentation
+error in CodeIgniter then please check a few things first:
+
+- There is not already an open Issue
+- The issue has already been fixed (check the develop branch, or look for
+  closed Issues)
+- Is it something really obvious that you fix it yourself?
+
+Reporting issues is helpful but an even better approach is to send a Pull
+Request, which is done by "Forking" the main repository and committing to your
+own copy. This will require you to use the version control system called Git.
+
+**********
+Guidelines
+**********
+
+Before we look into how, here are the guidelines. If your Pull Requests fail
+to pass these guidelines it will be declined and you will need to re-submit
+when you’ve made the changes. This might sound a bit tough, but it is required
+for us to maintain quality of the code-base.
+
+PHP Style
+=========
+
+All code must meet the `Style Guide
+<http://codeigniter.com/user_guide/general/styleguide.html>`_, which is
+essentially the `Allman indent style
+<http://en.wikipedia.org/wiki/Indent_style#Allman_style>`_, underscores and
+readable operators. This makes certain that all code is the same format as the
+existing code and means it will be as readable as possible.
+
+Documentation
+=============
+
+If you change anything that requires a change to documentation then you will
+need to add it. New classes, methods, parameters, changing default values, etc
+are all things that will require a change to documentation. The change-log
+must also be updated for every change. Also PHPDoc blocks must be maintained.
+
+Compatibility
+=============
+
+CodeIgniter is compatible with PHP 5.2.4 so all code supplied must stick to
+this requirement. If PHP 5.3 or 5.4 functions or features are used then there
+must be a fallback for PHP 5.2.4.
+
+Branching
+=========
+
+CodeIgniter uses the `Git-Flow
+<http://nvie.com/posts/a-successful-git-branching-model/>`_ branching model
+which requires all pull requests to be sent to the "develop" branch. This is
+where the next planned version will be developed. The "master" branch will
+always contain the latest stable version and is kept clean so a "hotfix" (e.g:
+an emergency security patch) can be applied to master to create a new version,
+without worrying about other features holding it up. For this reason all
+commits need to be made to "develop" and any sent to "master" will be closed
+automatically. If you have multiple changes to submit, please place all
+changes into their own branch on your fork.
+
+One thing at a time: A pull request should only contain one change. That does
+not mean only one commit, but one change - however many commits it took. The
+reason for this is that if you change X and Y but send a pull request for both
+at the same time, we might really want X but disagree with Y, meaning we
+cannot merge the request. Using the Git-Flow branching model you can create
+new branches for both of these features and send two requests.
+
+Signing
+=======
+You must sign your work, certifying that you either wrote the work or
+otherwise have the right to pass it on to an open source project. git makes
+this trivial as you merely have to use `--signoff` on your commits to your
+CodeIgniter fork.
+
+.. code-block:: bash
+
+	git commit --signoff
+
+or simply
+
+.. code-block:: bash
+
+	git commit -s
+
+This will sign your commits with the information setup in your git config, e.g.
+
+	Signed-off-by: John Q Public <john.public@example.com>
+
+If you are using Tower there is a "Sign-Off" checkbox in the commit window. You 
+could even alias git commit to use the -s flag so you don’t have to think about 
+it.
+
+By signing your work in this manner, you certify to a "Developer's Certificate 
+or Origin". The current version of this certificate is in the :doc:`/DCO` file
+in the root of this documentation.
diff --git a/user_guide_src/source/database/configuration.rst b/user_guide_src/source/database/configuration.rst
index 7a19c84..636b5b5 100644
--- a/user_guide_src/source/database/configuration.rst
+++ b/user_guide_src/source/database/configuration.rst
@@ -12,26 +12,45 @@
 The config settings are stored in a multi-dimensional array with this
 prototype::
 
-	$db['default']['hostname'] = "localhost";
-	$db['default']['username'] = "root";
-	$db['default']['password'] = "";
-	$db['default']['database'] = "database_name";
-	$db['default']['dbdriver'] = "mysql";
-	$db['default']['dbprefix'] = "";
-	$db['default']['pconnect'] = TRUE;
-	$db['default']['db_debug'] = FALSE;
-	$db['default']['cache_on'] = FALSE;
-	$db['default']['cachedir'] =  "";
-	$db['default']['char_set'] = "utf8";
-	$db['default']['dbcollat'] = "utf8_general_ci";
-	$db['default']['swap_pre'] = "";
-	$db['default']['autoinit'] = TRUE;
-	$db['default']['stricton'] = FALSE;
+	$db['default'] = array(
+		'dsn'	=> '',
+		'hostname' => 'localhost',
+		'username' => 'root',
+		'password' => '',
+		'database' => 'database_name',
+		'dbdriver' => 'mysqli',
+		'dbprefix' => '',
+		'pconnect' => TRUE,
+		'db_debug' => TRUE,
+		'cache_on' => FALSE,
+		'cachedir' => '',
+		'char_set' => 'utf8',
+		'dbcollat' => 'utf8_general_ci',
+		'swap_pre' => '',
+		'autoinit' => TRUE,
+		'compress' => TRUE,
+		'stricton' => FALSE,
+		'failover' => array()
+	);
 
-If you use PDO as your dbdriver, you can specify the full DSN string describe a connection to the database like this::
+Some database drivers (such as PDO, PostgreSQL, Oracle, ODBC) might
+require a full DSN string to be provided. If that is the case, you
+should use the 'dsn' configuration setting, as if you're using the
+driver's underlying native PHP extension, like this::
 
+	// PDO
 	$db['default']['dsn'] = 'pgsql:host=localhost;port=5432;dbname=database_name';
 
+	// Oracle
+	$db['default']['dsn'] = '//localhost/XE';
+
+.. note:: If you do not specify a DSN string for a driver that requires it, CodeIgniter
+	will try to build it with the rest of the provided settings.
+
+.. note:: If you provide a DSN string and it is missing some valid settings (e.g. the
+	database character set), which are present in the rest of the configuration
+	fields, CodeIgniter will append them.
+
 You can also specify failovers for the situation when the main connection cannot connect for some reason.
 These failovers can be specified by setting the failover for a connection like this::
 
@@ -41,7 +60,7 @@
 				'username' => '',
 				'password' => '',
 				'database' => '',
-				'dbdriver' => 'mysql',
+				'dbdriver' => 'mysqli',
 				'dbprefix' => '',
 				'pconnect' => TRUE,
 				'db_debug' => TRUE,
@@ -51,6 +70,7 @@
 				'dbcollat' => 'utf8_general_ci',
 				'swap_pre' => '',
 				'autoinit' => TRUE,
+				'compress' => TRUE,
 				'stricton' => FALSE
 			),
 			array(
@@ -58,7 +78,7 @@
 				'username' => '',
 				'password' => '',
 				'database' => '',
-				'dbdriver' => 'mysql',
+				'dbdriver' => 'mysqli',
 				'dbprefix' => '',
 				'pconnect' => TRUE,
 				'db_debug' => TRUE,
@@ -68,6 +88,7 @@
 				'dbcollat' => 'utf8_general_ci',
 				'swap_pre' => '',
 				'autoinit' => TRUE,
+				'compress' => TRUE,
 				'stricton' => FALSE
 			)
 		);
@@ -81,30 +102,35 @@
 connection group for each, then switch between groups as needed. For
 example, to set up a "test" environment you would do this::
 
-	$db['test']['hostname'] = "localhost";
-	$db['test']['username'] = "root";
-	$db['test']['password'] = "";
-	$db['test']['database'] = "database_name";
-	$db['test']['dbdriver'] = "mysql";
-	$db['test']['dbprefix'] = "";
-	$db['test']['pconnect'] = TRUE;
-	$db['test']['db_debug'] = FALSE;
-	$db['test']['cache_on'] = FALSE;
-	$db['test']['cachedir'] =  "";
-	$db['test']['char_set'] = "utf8";
-	$db['test']['dbcollat'] = "utf8_general_ci";
-	$db['test']['swap_pre'] = "";
-	$db['test']['autoinit'] = TRUE;
-	$db['test']['stricton'] = FALSE;
+	$db['test'] = array(
+		'dsn'	=> '',
+		'hostname' => 'localhost',
+		'username' => 'root',
+		'password' => '',
+		'database' => 'database_name',
+		'dbdriver' => 'mysqli',
+		'dbprefix' => '',
+		'pconnect' => TRUE,
+		'db_debug' => TRUE,
+		'cache_on' => FALSE,
+		'cachedir' => '',
+		'char_set' => 'utf8',
+		'dbcollat' => 'utf8_general_ci',
+		'swap_pre' => '',
+		'autoinit' => TRUE,
+		'compress' => TRUE,
+		'stricton' => FALSE,
+		'failover' => array()
+	);
 
 Then, to globally tell the system to use that group you would set this
 variable located in the config file::
 
-	$active_group = "test";
+	$active_group = 'test';
 
-Note: The name "test" is arbitrary. It can be anything you want. By
-default we've used the word "default" for the primary connection, but it
-too can be renamed to something more relevant to your project.
+.. note:: The name 'test' is arbitrary. It can be anything you want. By
+	default we've used the word "default" for the primary connection,
+	but it too can be renamed to something more relevant to your project.
 
 Query Builder
 -------------
@@ -119,8 +145,8 @@
 
 	$query_builder = TRUE;
 
-.. note:: that some CodeIgniter classes such as Sessions require Active
-	Records be enabled to access certain functionality.
+.. note:: that some CodeIgniter classes such as Sessions require Query
+	Builder to be enabled to access certain functionality.
 
 Explanation of Values:
 ----------------------
@@ -128,11 +154,12 @@
 ======================  ==================================================================================================
  Name Config             Description
 ======================  ==================================================================================================
-**hostname** 		The hostname of your database server. Often this is "localhost".
+**dsn**			The DSN connect string (an all-in-one configuration sequence).
+**hostname** 		The hostname of your database server. Often this is 'localhost'.
 **username**		The username used to connect to the database.
 **password**		The password used to connect to the database.
 **database**		The name of the database you want to connect to.
-**dbdriver**		The database type. ie: mysql, postgre, odbc, etc. Must be specified in lower case.
+**dbdriver**		The database type. ie: mysqli, postgre, odbc, etc. Must be specified in lower case.
 **dbprefix**		An optional table prefix which will added to the table name when running :doc:
 			`Query Builder <query_builder>` queries. This permits multiple CodeIgniter installations
 			to share one database.
@@ -144,30 +171,24 @@
 **char_set**		The character set used in communicating with the database.
 **dbcollat**		The character collation used in communicating with the database
 
-			.. note:: For MySQL and MySQLi databases, this setting is only used
-				as a backup if your server is running PHP < 5.2.3 or MySQL < 5.0.7
-				(and in table creation queries made with DB Forge). There is an
-				incompatibility in PHP with mysql_real_escape_string() which can
-				make your site vulnerable to SQL injection if you are using a
-				multi-byte character set and are running versions lower than these.
-				Sites using Latin-1 or UTF-8 database character set and collation are
-				unaffected.
+			.. note:: Only used in the 'mysql' and 'mysqli' drivers.
 
 **swap_pre**		A default table prefix that should be swapped with dbprefix. This is useful for distributed
 			applications where you might run manually written queries, and need the prefix to still be
 			customizable by the end user.
 **autoinit**		Whether or not to automatically connect to the database when the library loads. If set to false,
 			the connection will take place prior to executing the first query.
+**compress**		Whether or not to use client compression for MySQL or MySQLi.
 **stricton**		TRUE/FALSE (boolean) - Whether to force "Strict Mode" connections, good for ensuring strict SQL
 			while developing an application.
 **port**		The database port number. To use this value you have to add a line to the database config array.
 			::
-			
-				$db['default']['port'] =  5432;
+
+				$db['default']['port'] = 5432;
 ======================  ==================================================================================================
 
 .. note:: Depending on what database platform you are using (MySQL, PostgreSQL,
 	etc.) not all values will be needed. For example, when using SQLite you
 	will not need to supply a username or password, and the database name
 	will be the path to your database file. The information above assumes
-	you are using MySQL.
+	you are using MySQL.
\ No newline at end of file
diff --git a/user_guide_src/source/database/connecting.rst b/user_guide_src/source/database/connecting.rst
index 5822ca6..9b81170 100644
--- a/user_guide_src/source/database/connecting.rst
+++ b/user_guide_src/source/database/connecting.rst
@@ -57,25 +57,28 @@
 To connect manually to a desired database you can pass an array of
 values::
 
-	$config['hostname'] = "localhost"; 
-	$config['username'] = "myusername"; 
-	$config['password'] = "mypassword"; 
-	$config['database'] = "mydatabase"; 
-	$config['dbdriver'] = "mysql"; 
-	$config['dbprefix'] = ""; 
-	$config['pconnect'] = FALSE; 
-	$config['db_debug'] = TRUE; 
-	$config['cache_on'] = FALSE; 
-	$config['cachedir'] = ""; 
-	$config['char_set'] = "utf8"; 
-	$config['dbcollat'] = "utf8_general_ci";  
+	$config['hostname'] = 'localhost';
+	$config['username'] = 'myusername';
+	$config['password'] = 'mypassword';
+	$config['database'] = 'mydatabase';
+	$config['dbdriver'] = 'mysqli';
+	$config['dbprefix'] = '';
+	$config['pconnect'] = FALSE;
+	$config['db_debug'] = TRUE;
+	$config['cache_on'] = FALSE;
+	$config['cachedir'] = '';
+	$config['char_set'] = 'utf8';
+	$config['dbcollat'] = 'utf8_general_ci';
 	$this->load->database($config);
 
 For information on each of these values please see the :doc:`configuration
 page <configuration>`.
 
-.. note:: For the PDO driver, $config['hostname'] should look like
-	this: 'mysql:host=localhost'
+.. note:: For the PDO driver, you should use the $config['dsn'] setting
+	instead of 'hostname' and 'database':
+
+	|
+	| $config['dsn'] = 'mysql:host=localhost;dbname=mydatabase';
 
 Or you can submit your database values as a Data Source Name. DSNs must
 have this prototype::
@@ -149,5 +152,4 @@
 
 ::
 
-	$this->db->close();
-
+	$this->db->close();
\ No newline at end of file
diff --git a/user_guide_src/source/database/results.rst b/user_guide_src/source/database/results.rst
index ac4fc37..d032f73 100644
--- a/user_guide_src/source/database/results.rst
+++ b/user_guide_src/source/database/results.rst
@@ -139,13 +139,13 @@
 .. note:: all the functions above will load the whole result into memory (prefetching) use unbuffered_row() for processing large result sets.
 
 unbuffered_row($type)
-=====
+=====================
 
 This function returns a single result row without prefetching the whole result in memory as row() does.
 If your query has more than one row, it returns the current row and moves the internal data pointer ahead. 
 The result is returned as $type could be 'object' (default) or 'array' that will return an associative array.
 
-
+::
 
 	$query = $this->db->query("YOUR QUERY");
 	
diff --git a/user_guide_src/source/general/models.rst b/user_guide_src/source/general/models.rst
index 2e1e025..4e52a96 100644
--- a/user_guide_src/source/general/models.rst
+++ b/user_guide_src/source/general/models.rst
@@ -72,10 +72,11 @@
 
 	class Model_name extends CI_Model {
 
-	    function __construct()
-	    {
-	        parent::__construct();
-	    }
+		public function __construct()
+		{
+			parent::__construct();
+		}
+
 	}
 
 Where **Model_name** is the name of your class. Class names **must** have
@@ -87,10 +88,11 @@
 
 	class User_model extends CI_Model {
 
-	    function __construct()
-	    {
-	        parent::__construct();
-	    }
+		public function __construct()
+		{
+			parent::__construct();
+		}
+
 	}
 
 Your file will be this::
@@ -102,7 +104,7 @@
 
 Your models will typically be loaded and called from within your
 :doc:`controller <controllers>` functions. To load a model you will use
-the following function::
+the following method::
 
 	$this->load->model('model_name');
 
@@ -112,33 +114,34 @@
 
 	$this->load->model('blog/queries');
 
-Once loaded, you will access your model functions using an object with
-the same name as your class::
+Once loaded, you will access your model methods using an object with the
+same name as your class::
 
 	$this->load->model('model_name');
 
-	$this->model_name->function();
+	$this->model_name->method();
 
 If you would like your model assigned to a different object name you can
-specify it via the second parameter of the loading function::
+specify it via the second parameter of the loading method::
 
-	$this->load->model('model_name', 'fubar');
+	$this->load->model('model_name', 'foobar');
 
-	$this->fubar->function();
+	$this->foobar->method();
 
 Here is an example of a controller, that loads a model, then serves a
 view::
 
 	class Blog_controller extends CI_Controller {
 
-	    function blog()
-	    {
-	        $this->load->model('blog');
+		public function blog()
+		{
+			$this->load->model('blog');
 
-	        $data['query'] = $this->Blog->get_last_ten_entries();
+			$data['query'] = $this->Blog->get_last_ten_entries();
 
-	        $this->load->view('blog', $data);
-	    }
+			$this->load->view('blog', $data);
+		}
+
 	}
 	
 
@@ -170,15 +173,13 @@
 -  You can manually pass database connectivity settings via the third
    parameter::
 
-	$config['hostname'] = "localhost";
-	$config['username'] = "myusername";
-	$config['password'] = "mypassword";
-	$config['database'] = "mydatabase";
-	$config['dbdriver'] = "mysql";
-	$config['dbprefix'] = "";
+	$config['hostname'] = 'localhost';
+	$config['username'] = 'myusername';
+	$config['password'] = 'mypassword';
+	$config['database'] = 'mydatabase';
+	$config['dbdriver'] = 'mysqli';
+	$config['dbprefix'] = '';
 	$config['pconnect'] = FALSE;
 	$config['db_debug'] = TRUE;
 
-	$this->load->model('Model_name', '', $config);
-
-
+	$this->load->model('Model_name', '', $config);
\ No newline at end of file
diff --git a/user_guide_src/source/general/reserved_names.rst b/user_guide_src/source/general/reserved_names.rst
index 5ce7fc2..3354375 100644
--- a/user_guide_src/source/general/reserved_names.rst
+++ b/user_guide_src/source/general/reserved_names.rst
@@ -45,11 +45,11 @@
 ---------
 
 -  ENVIRONMENT
--  EXT
 -  FCPATH
 -  SELF
 -  BASEPATH
 -  APPPATH
+-  VIEWPATH
 -  CI_VERSION
 -  FILE_READ_MODE
 -  FILE_WRITE_MODE
diff --git a/user_guide_src/source/general/welcome.rst b/user_guide_src/source/general/welcome.rst
new file mode 100644
index 0000000..b28c3bc
--- /dev/null
+++ b/user_guide_src/source/general/welcome.rst
@@ -0,0 +1,32 @@
+######################
+Welcome to CodeIgniter
+######################
+
+CodeIgniter is an Application Development Framework - a toolkit - for
+people who build web sites using PHP. Its goal is to enable you to
+develop projects much faster than you could if you were writing code
+from scratch, by providing a rich set of libraries for commonly needed
+tasks, as well as a simple interface and logical structure to access
+these libraries. CodeIgniter lets you creatively focus on your project
+by minimizing the amount of code needed for a given task.
+
+***********************
+Who is CodeIgniter For?
+***********************
+
+CodeIgniter is right for you if:
+
+-  You want a framework with a small footprint.
+-  You need exceptional performance.
+-  You need broad compatibility with standard hosting accounts that run
+   a variety of PHP versions and configurations.
+-  You want a framework that requires nearly zero configuration.
+-  You want a framework that does not require you to use the command
+   line.
+-  You want a framework that does not require you to adhere to
+   restrictive coding rules.
+-  You are not interested in large-scale monolithic libraries like PEAR.
+-  You do not want to be forced to learn a templating language (although
+   a template parser is optionally available if you desire one).
+-  You eschew complexity, favoring simple solutions.
+-  You need clear, thorough documentation.
diff --git a/user_guide_src/source/helpers/array_helper.rst b/user_guide_src/source/helpers/array_helper.rst
index 4308753..15b5e17 100644
--- a/user_guide_src/source/helpers/array_helper.rst
+++ b/user_guide_src/source/helpers/array_helper.rst
@@ -21,17 +21,17 @@
 element()
 =========
 
-.. php:method:: element($item, $array, $default = FALSE)
+.. php:method:: element($item, $array, $default = NULL)
 
 	:param string 	$item: Item to fetch from the array
 	:param array 	$array: Input array
 	:param boolean	$default: What to return if the array isn't valid
-	:returns: FALSE on failure or the array item.
+	:returns: NULL on failure or the array item.
 
 
 Lets you fetch an item from an array. The function tests whether the
 array index is set and whether it has a value. If a value exists it is
-returned. If a value does not exist it returns FALSE, or whatever you've
+returned. If a value does not exist it returns NULL, or whatever you've
 specified as the default value via the third parameter. Example
 
 ::
@@ -43,31 +43,31 @@
 	);
 
 	echo element('color', $array); // returns "red" 
-	echo element('size', $array, NULL); // returns NULL 
+	echo element('size', $array, 'foobar'); // returns "foobar" 
 
 elements()
 ==========
 
 Lets you fetch a number of items from an array. The function tests
 whether each of the array indices is set. If an index does not exist it
-is set to FALSE, or whatever you've specified as the default value via
+is set to NULL, or whatever you've specified as the default value via
 the third parameter. 
 
-.. php:method:: elements($items, $array, $default = FALSE)
+.. php:method:: elements($items, $array, $default = NULL)
 
 	:param string 	$item: Item to fetch from the array
 	:param array 	$array: Input array
 	:param boolean	$default: What to return if the array isn't valid
-	:returns: FALSE on failure or the array item.
+	:returns: NULL on failure or the array item.
 
 Example
 
 ::
 
 	$array = array(
-		'color' => 'red',  
-		'shape' => 'round',     
-		'radius' => '10',     
+		'color' => 'red',
+		'shape' => 'round',
+		'radius' => '10',
 		'diameter' => '20'
 	);
 
@@ -78,25 +78,25 @@
 ::
 
 	array(
-		'color' => 'red',     
-		'shape' => 'round',     
-		'height' => FALSE
+		'color' => 'red',
+		'shape' => 'round',
+		'height' => NULL
 	);
 
 You can set the third parameter to any default value you like
 
 ::
 
-	 $my_shape = elements(array('color', 'shape', 'height'), $array, NULL);
+	 $my_shape = elements(array('color', 'shape', 'height'), $array, 'foobar');
 
 The above will return the following array
 
 ::
 
 	array(     
-		'color' 	=> 'red',     
-		'shape' 	=> 'round',     
-		'height'	=> NULL
+		'color' 	=> 'red',
+		'shape' 	=> 'round',
+		'height'	=> 'foobar'
 	);
 
 This is useful when sending the $_POST array to one of your Models.
diff --git a/user_guide_src/source/helpers/captcha_helper.rst b/user_guide_src/source/helpers/captcha_helper.rst
index 48095a1..9024473 100644
--- a/user_guide_src/source/helpers/captcha_helper.rst
+++ b/user_guide_src/source/helpers/captcha_helper.rst
@@ -102,7 +102,7 @@
 	CREATE TABLE captcha (  
 		captcha_id bigint(13) unsigned NOT NULL auto_increment,  
 		captcha_time int(10) unsigned NOT NULL,  
-		ip_address varchar(16) default '0' NOT NULL,  
+		ip_address varchar(45) NOT NULL,  
 		word varchar(20) NOT NULL,  
 		PRIMARY KEY `captcha_id` (`captcha_id`),  
 		KEY `word` (`word`)
diff --git a/user_guide_src/source/helpers/date_helper.rst b/user_guide_src/source/helpers/date_helper.rst
index ba07939..e332a91 100644
--- a/user_guide_src/source/helpers/date_helper.rst
+++ b/user_guide_src/source/helpers/date_helper.rst
@@ -40,7 +40,7 @@
 mdate()
 =======
 
-This function is identical to PHPs `date() <http://www.php.net/date>`_
+This function is identical to PHP's `date() <http://www.php.net/date>`_
 function, except that it lets you use MySQL style date codes, where each
 code letter is preceded with a percent sign: %Y %m %d etc.
 
@@ -85,32 +85,29 @@
 The first parameter must contain the format, the second parameter must
 contain the date as a Unix timestamp.
 
+.. note:: This function is DEPRECATED. Use the native ``date()`` combined
+	with `DateTime's format constants <http://www.php.net/manual/en/class.datetime.php#datetime.constants.types>`_
+	instead:
+
+	|
+	| echo date(DATE_RFC822, time());
+
 Supported formats:
 
-+----------------+------------------------+-----------------------------------+
-| Constant       | Description            | Example                           |
-+================+========================+===================================+
-| DATE_ATOM      | Atom                   | 2005-08-15T16:13:03+0000          |
-+----------------+------------------------+-----------------------------------+
-| DATE_COOKIE    | HTTP Cookies           | Sun, 14 Aug 2005 16:13:03 UTC     |
-+----------------+------------------------+-----------------------------------+
-| DATE_ISO8601   | ISO-8601               | 2005-08-14T16:13:03+00:00         |
-+----------------+------------------------+-----------------------------------+
-| DATE_RFC822    | RFC 822                | Sun, 14 Aug 05 16:13:03 UTC       |
-+----------------+------------------------+-----------------------------------+
-| DATE_RFC850    | RFC 850                | Sunday, 14-Aug-05 16:13:03 UTC    |
-+----------------+------------------------+-----------------------------------+
-| DATE_RFC1036   | RFC 1036               | Sunday, 14-Aug-05 16:13:03 UTC    |
-+----------------+------------------------+-----------------------------------+
-| DATE_RFC1123   | RFC 1123               | Sun, 14 Aug 2005 16:13:03 UTC     |
-+----------------+------------------------+-----------------------------------+
-| DATE_RFC2822   | RFC 2822               | Sun, 14 Aug 2005 16:13:03 +0000   |
-+----------------+------------------------+-----------------------------------+
-| DATE_RSS       | RSS                    | Sun, 14 Aug 2005 16:13:03 UTC     |
-+----------------+------------------------+-----------------------------------+
-| DATE_W3C       | W3C                    | 2005-08-14T16:13:03+0000          |
-+----------------+------------------------+-----------------------------------+
-
+===============	=======================	======================================
+Constant		Description				Example
+===============	=======================	======================================
+DATE_ATOM	Atom			2005-08-15T16:13:03+0000
+DATE_COOKIE	HTTP Cookies		Sun, 14 Aug 2005 16:13:03 UTC
+DATE_ISO8601   	ISO-8601		2005-08-14T16:13:03+00:00
+DATE_RFC822	RFC 822			Sun, 14 Aug 05 16:13:03 UTC
+DATE_RFC850	RFC 850			Sunday, 14-Aug-05 16:13:03 UTC
+DATE_RFC1036	RFC 1036		Sunday, 14-Aug-05 16:13:03 UTC
+DATE_RFC1123	RFC 1123		Sun, 14 Aug 2005 16:13:03 UTC
+DATE_RFC2822 	RFC 2822		Sun, 14 Aug 2005 16:13:03 +0000
+DATE_RSS	RSS			Sun, 14 Aug 2005 16:13:03 UTC
+DATE_W3C	W3C			2005-08-14T16:13:03+0000
+===============	=======================	======================================
 
 local_to_gmt()
 ==============
@@ -421,86 +418,47 @@
 
 Note some of the location lists have been abridged for clarity and formatting.
 
-+------------+----------------------------------------------------------------+
-| Time Zone  | Location                                                       |
-+============+================================================================+
-| UM12       | (UTC - 12:00) Baker/Howland Island	                          |
-+------------+----------------------------------------------------------------+
-| UM11       | (UTC - 11:00) Samoa Time Zone, Niue						      |
-+------------+----------------------------------------------------------------+
-| UM10       | (UTC - 10:00) Hawaii-Aleutian Standard Time, Cook Islands	  |
-+------------+----------------------------------------------------------------+
-| UM95       | (UTC - 09:30) Marquesas Islands							      |
-+------------+----------------------------------------------------------------+
-| UM9        | (UTC - 09:00) Alaska Standard Time, Gambier Islands		      |
-+------------+----------------------------------------------------------------+
-| UM8        | (UTC - 08:00) Pacific Standard Time, Clipperton Island	      |
-+------------+----------------------------------------------------------------+
-| UM7        | (UTC - 11:00) Mountain Standard Time						      |
-+------------+----------------------------------------------------------------+
-| UM6        | (UTC - 06:00) Central Standard Time						      |
-+------------+----------------------------------------------------------------+
-| UM5        | (UTC - 05:00) Eastern Standard Time, Western Caribbean		  |
-+------------+----------------------------------------------------------------+
-| UM45       | (UTC - 04:30) Venezuelan Standard Time					      |
-+------------+----------------------------------------------------------------+
-| UM4        | (UTC - 04:00) Atlantic Standard Time, Eastern Caribbean		  |
-+------------+----------------------------------------------------------------+
-| UM35       | (UTC - 03:30) Newfoundland Standard Time					      |
-+------------+----------------------------------------------------------------+
-| UM3        | (UTC - 03:00) Argentina, Brazil, French Guiana, Uruguay	      |
-+------------+----------------------------------------------------------------+
-| UM2        | (UTC - 02:00) South Georgia/South Sandwich Islands		      |
-+------------+----------------------------------------------------------------+
-| UM1        | (UTC -1:00) Azores, Cape Verde Islands						  |
-+------------+----------------------------------------------------------------+
-| UTC        | (UTC) Greenwich Mean Time, Western European Time				  |
-+------------+----------------------------------------------------------------+
-| UP1        | (UTC +1:00) Central European Time, West Africa Time			  |
-+------------+----------------------------------------------------------------+
-| UP2        | (UTC +2:00) Central Africa Time, Eastern European Time		  |
-+------------+----------------------------------------------------------------+
-| UP3        | (UTC +3:00) Moscow Time, East Africa Time			  		  |
-+------------+----------------------------------------------------------------+
-| UP35       | (UTC +3:30) Iran Standard Time								  |
-+------------+----------------------------------------------------------------+
-| UP4        | (UTC +4:00) Azerbaijan Standard Time, Samara Time			  |
-+------------+----------------------------------------------------------------+
-| UP45       | (UTC +4:30) Afghanistan										  |
-+------------+----------------------------------------------------------------+
-| UP5        | (UTC +5:00) Pakistan Standard Time, Yekaterinburg Time		  |
-+------------+----------------------------------------------------------------+
-| UP55       | (UTC +5:30) Indian Standard Time, Sri Lanka Time				  |
-+------------+----------------------------------------------------------------+
-| UP575      | (UTC +5:45) Nepal Time										  |
-+------------+----------------------------------------------------------------+
-| UP6        | (UTC +6:00) Bangladesh Standard Time, Bhutan Time, Omsk Time   |
-+------------+----------------------------------------------------------------+
-| UP65       | (UTC +6:30) Cocos Islands, Myanmar							  |
-+------------+----------------------------------------------------------------+
-| UP7        | (UTC +7:00) Krasnoyarsk Time, Cambodia, Laos, Thailand, Vietnam|
-+------------+----------------------------------------------------------------+
-| UP8        | (UTC +8:00) Australian Western Standard Time, Beijing Time	  |
-+------------+----------------------------------------------------------------+
-| UP875      | (UTC +8:45) Australian Central Western Standard Time		      |
-+------------+----------------------------------------------------------------+
-| UP9        | (UTC +9:00) Japan Standard Time, Korea Standard Time, Yakutsk  |
-+------------+----------------------------------------------------------------+
-| UP95       | (UTC +9:30) Australian Central Standard Time					  |
-+------------+----------------------------------------------------------------+
-| UP10       | (UTC +10:00) Australian Eastern Standard Time, Vladivostok Time|
-+------------+----------------------------------------------------------------+
-| UP105      | (UTC +10:30) Lord Howe Island								  |
-+------------+----------------------------------------------------------------+
-| UP11       | (UTC +11:00) Magadan Time, Solomon Islands, Vanuatu            |
-+------------+----------------------------------------------------------------+
-| UP115      | (UTC +11:30) Norfolk Island									  |
-+------------+----------------------------------------------------------------+
-| UP12       | (UTC +12:00) Fiji, Gilbert Islands, Kamchatka, New Zealand     |
-+------------+----------------------------------------------------------------+
-| UP1275     | (UTC +12:45) Chatham Islands Standard Time					  |
-+------------+----------------------------------------------------------------+
-| UP13       | (UTC +13:00) Phoenix Islands Time, Tonga						  |
-+------------+----------------------------------------------------------------+
-| UP14       | (UTC +14:00) Line Islands									  |
-+------------+----------------------------------------------------------------+
+===========	=====================================================================
+Time Zone	Location
+===========	=====================================================================
+UM2			(UTC - 12:00) Baker/Howland Island
+UM1			(UTC - 11:00) Samoa Time Zone, Niue
+UM0			(UTC - 10:00) Hawaii-Aleutian Standard Time, Cook Islands
+UM95		(UTC - 09:30) Marquesas Islands
+UM9			(UTC - 09:00) Alaska Standard Time, Gambier Islands
+UM8			(UTC - 08:00) Pacific Standard Time, Clipperton Island
+UM7			(UTC - 11:00) Mountain Standard Time
+UM6			(UTC - 06:00) Central Standard Time
+UM5			(UTC - 05:00) Eastern Standard Time, Western Caribbean
+UM45		(UTC - 04:30) Venezuelan Standard Time
+UM4			(UTC - 04:00) Atlantic Standard Time, Eastern Caribbean
+UM35		(UTC - 03:30) Newfoundland Standard Time
+UM3			(UTC - 03:00) Argentina, Brazil, French Guiana, Uruguay
+UM2			(UTC - 02:00) South Georgia/South Sandwich Islands
+UM			(UTC -1:00) Azores, Cape Verde Islands
+UTC			(UTC) Greenwich Mean Time, Western European Time
+UP1			(UTC +1:00) Central European Time, West Africa Time
+UP2			(UTC +2:00) Central Africa Time, Eastern European Time
+UP3			(UTC +3:00) Moscow Time, East Africa Time
+UP35		(UTC +3:30) Iran Standard Time
+UP4			(UTC +4:00) Azerbaijan Standard Time, Samara Time
+UP45		(UTC +4:30) Afghanistan
+UP5			(UTC +5:00) Pakistan Standard Time, Yekaterinburg Time
+UP55		(UTC +5:30) Indian Standard Time, Sri Lanka Time
+UP575		(UTC +5:45) Nepal Time
+UP6			(UTC +6:00) Bangladesh Standard Time, Bhutan Time, Omsk Time
+UP65		(UTC +6:30) Cocos Islands, Myanmar
+UP7			(UTC +7:00) Krasnoyarsk Time, Cambodia, Laos, Thailand, Vietnam
+UP8			(UTC +8:00) Australian Western Standard Time, Beijing Time
+UP875		(UTC +8:45) Australian Central Western Standard Time
+UP9			(UTC +9:00) Japan Standard Time, Korea Standard Time, Yakutsk
+UP95		(UTC +9:30) Australian Central Standard Time
+UP10		(UTC +10:00) Australian Eastern Standard Time, Vladivostok Time
+UP105		(UTC +10:30) Lord Howe Island
+UP11		(UTC +11:00) Magadan Time, Solomon Islands, Vanuatu
+UP115		(UTC +11:30) Norfolk Island
+UP12		(UTC +12:00) Fiji, Gilbert Islands, Kamchatka, New Zealand
+UP1275		(UTC +12:45) Chatham Islands Standard Time
+UP1			(UTC +13:00) Phoenix Islands Time, Tonga
+UP14		(UTC +14:00) Line Islands
+===========	=====================================================================
\ No newline at end of file
diff --git a/user_guide_src/source/helpers/form_helper.rst b/user_guide_src/source/helpers/form_helper.rst
index a110f3c..fa7b3db 100644
--- a/user_guide_src/source/helpers/form_helper.rst
+++ b/user_guide_src/source/helpers/form_helper.rst
@@ -543,3 +543,7 @@
 	<input type="radio" name="myradio" value="1" <?php echo  set_radio('myradio', '1', TRUE); ?> />
 	<input type="radio" name="myradio" value="2" <?php echo  set_radio('myradio', '2'); ?> />
 
+.. note:: If you are using the Form Validation class, you must always specify a rule for your field,
+	even if empty, in order for the set_*() functions to work. This is because if a Form Validation object
+	is defined, the control for set_*() is handed over to a method of the class instead of the generic helper
+	function.
\ No newline at end of file
diff --git a/user_guide_src/source/helpers/url_helper.rst b/user_guide_src/source/helpers/url_helper.rst
index 3c91fd5..1987dfb 100644
--- a/user_guide_src/source/helpers/url_helper.rst
+++ b/user_guide_src/source/helpers/url_helper.rst
@@ -182,9 +182,9 @@
 	echo anchor_popup('news/local/123', 'Click Me!', $atts);
 
 .. note:: The above attributes are the function defaults so you only need to
-set the ones that are different from what you need. If you want the
-function to use all of its defaults simply pass an empty array in the
-third parameter
+	set the ones that are different from what you need. If you want the
+	function to use all of its defaults simply pass an empty array in the
+	third parameter
 
 ::
 
@@ -207,7 +207,12 @@
 	echo mailto('me@my-site.com', 'Click Here to Contact Me');
 
 As with the anchor() tab above, you can set attributes using the third
-parameter.
+parameter:
+
+::
+
+    $attributes = array('title' => 'Mail me');
+    echo mailto('me@my-site.com', 'Contact Me', $attributes);
 
 safe_mailto()
 =============
@@ -298,7 +303,7 @@
 
 The optional second parameter allows you to force a particular redirection
 method. The available methods are "location" or "refresh", with location
-being faster but less reliable on Windows servers. The default is "auto",
+being faster but less reliable on IIS servers. The default is "auto",
 which will attempt to intelligently choose the method based on the server
 environment.
 
@@ -320,3 +325,7 @@
 
 .. note:: For very fine grained control over headers, you should use the
 	`Output Library </libraries/output>` set_header() function.
+
+.. note:: To IIS users: if you hide the `Server` HTTP header, the "auto"
+	method won't detect IIS, in that case it is advised you explicitly
+	use the "refresh" method.
diff --git a/user_guide_src/source/images/codeigniter_1.7.1_library_reference.png b/user_guide_src/source/images/codeigniter_1.7.1_library_reference.png
index 554ae2e..7f054f9 100644
--- a/user_guide_src/source/images/codeigniter_1.7.1_library_reference.png
+++ b/user_guide_src/source/images/codeigniter_1.7.1_library_reference.png
Binary files differ
diff --git a/user_guide_src/source/index.rst b/user_guide_src/source/index.rst
index 6cdeb24..3508970 100644
--- a/user_guide_src/source/index.rst
+++ b/user_guide_src/source/index.rst
@@ -1,34 +1,107 @@
-Welcome to CodeIgniter
-======================
+######################
+CodeIgniter User Guide
+######################
 
-CodeIgniter is an Application Development Framework - a toolkit - for
-people who build web sites using PHP. Its goal is to enable you to
-develop projects much faster than you could if you were writing code
-from scratch, by providing a rich set of libraries for commonly needed
-tasks, as well as a simple interface and logical structure to access
-these libraries. CodeIgniter lets you creatively focus on your project
-by minimizing the amount of code needed for a given task.
+- :doc:`License Agreement <license>`
+- :doc:`Change Log <changelog>`
 
-Who is CodeIgniter For?
-=======================
+.. contents::
+   :local:
+   :depth: 2
 
-CodeIgniter is right for you if:
+*******
+Welcome
+*******
 
--  You want a framework with a small footprint.
--  You need exceptional performance.
--  You need broad compatibility with standard hosting accounts that run
-   a variety of PHP versions and configurations.
--  You want a framework that requires nearly zero configuration.
--  You want a framework that does not require you to use the command
-   line.
--  You want a framework that does not require you to adhere to
-   restrictive coding rules.
--  You are not interested in large-scale monolithic libraries like PEAR.
--  You do not want to be forced to learn a templating language (although
-   a template parser is optionally available if you desire one).
--  You eschew complexity, favoring simple solutions.
--  You need clear, thorough documentation.
+- :doc:`general/welcome`
 
+**********
+Basic Info
+**********
+
+- :doc:`general/requirements`
+- :doc:`general/credits`
+
+************
+Installation
+************
+
+- :doc:`installation/downloads`
+- :doc:`installation/index`
+- :doc:`installation/upgrading`
+- :doc:`installation/troubleshooting`
+
+************
+Introduction
+************
+
+- :doc:`overview/getting_started`
+- :doc:`overview/at_a_glance`
+- :doc:`overview/cheatsheets`
+- :doc:`overview/features`
+- :doc:`overview/appflow`
+- :doc:`overview/mvc`
+- :doc:`overview/goals`
+
+********
+Tutorial
+********
+
+- :doc:`tutorial/index`
+- :doc:`tutorial/static_pages`
+- :doc:`tutorial/news_section`
+- :doc:`tutorial/create_news_items`
+- :doc:`tutorial/conclusion`
+
+**************
+General Topics
+**************
+
+.. toctree::
+	:glob:
+	:titlesonly:
+	
+	general/index
+
+*****************
+Library Reference
+*****************
+
+.. toctree::
+	:glob:
+	:titlesonly:
+	
+	libraries/index
+
+****************
+Driver Reference
+****************
+
+- :doc:`libraries/caching`
+- :doc:`database/index`
+- :doc:`libraries/javascript`
+- :doc:`libraries/sessions`
+
+****************
+Helper Reference
+****************
+
+.. toctree::
+	:glob:
+	:titlesonly:
+	
+	helpers/index
+
+***************************
+Contributing to CodeIgniter
+***************************
+
+.. toctree::
+	:glob:
+	:titlesonly:
+	
+	contributing/index
+	DCO
 
 .. toctree::
 	:glob:
@@ -38,6 +111,7 @@
 	*
 	overview/index
 	general/requirements
+	general/welcome
 	installation/index
 	general/index
 	libraries/index
@@ -46,4 +120,4 @@
 	documentation/index
 	tutorial/index
 	general/quick_reference
-	general/credits
\ No newline at end of file
+	general/credits
diff --git a/user_guide_src/source/installation/downloads.rst b/user_guide_src/source/installation/downloads.rst
index a4a6b7f..45a8f80 100644
--- a/user_guide_src/source/installation/downloads.rst
+++ b/user_guide_src/source/installation/downloads.rst
@@ -2,9 +2,15 @@
 Downloading CodeIgniter
 #######################
 
--  `CodeIgniter V 2.1.0 (Current
+-  `CodeIgniter V 3.0.0 (Current
    version) <http://codeigniter.com/downloads/>`_
 -  `CodeIgniter V
+   2.1.2 <http://codeigniter.com/download_files/reactor/CodeIgniter_2.1.2.zip>`_
+-  `CodeIgniter V
+   2.1.1 <http://codeigniter.com/download_files/reactor/CodeIgniter_2.1.1.zip>`_
+-  `CodeIgniter V
+   2.1.0 <http://codeigniter.com/download_files/reactor/CodeIgniter_2.1.0.zip>`_
+-  `CodeIgniter V
    2.0.3 <http://codeigniter.com/download_files/reactor/CodeIgniter_2.0.3.zip>`_
 -  `CodeIgniter V
    2.0.2 <http://codeigniter.com/download_files/reactor/CodeIgniter_2.0.2.zip>`_
diff --git a/user_guide_src/source/installation/upgrade_210.rst b/user_guide_src/source/installation/upgrade_210.rst
index 9d7e1a2..5874bfc 100644
--- a/user_guide_src/source/installation/upgrade_210.rst
+++ b/user_guide_src/source/installation/upgrade_210.rst
@@ -8,15 +8,19 @@
 Step 1: Update your CodeIgniter files
 =====================================
 
-Replace all files and directories in your "system" folder and replace
-your index.php file. If any modifications were made to your index.php
-they will need to be made fresh in this new one.
+Replace all files and directories in your "system" folder.
+
+.. note:: If you have any custom developed files in these folders please
+	make copies of them first.
 
 Step 2: Replace config/user_agents.php
 ======================================
 
 This config file has been updated to contain more user agent types,
-please copy it to application/config/user_agents.php.
+please copy it to _application/config/user_agents.php*.
 
-.. note:: If you have any custom developed files in these folders please
-	make copies of them first.
\ No newline at end of file
+Step 3: Update your user guide
+==============================
+
+Please also replace your local copy of the user guide with the new
+version.
\ No newline at end of file
diff --git a/user_guide_src/source/installation/upgrade_211.rst b/user_guide_src/source/installation/upgrade_211.rst
new file mode 100644
index 0000000..59faca8
--- /dev/null
+++ b/user_guide_src/source/installation/upgrade_211.rst
@@ -0,0 +1,33 @@
+#############################
+Upgrading from 2.1.0 to 2.1.1
+#############################
+
+Before performing an update you should take your site offline by
+replacing the index.php file with a static one.
+
+Step 1: Update your CodeIgniter files
+=====================================
+
+Replace all files and directories in your "system" folder and replace
+your index.php file. If any modifications were made to your index.php
+they will need to be made fresh in this new one.
+
+.. note:: If you have any custom developed files in these folders please
+	make copies of them first.
+
+Step 2: Replace config/mimes.php
+================================
+
+This config file has been updated to contain more user mime-types, please copy
+it to _application/config/mimes.php*.
+
+Step 3: Update your IP address tables
+=====================================
+
+This upgrade adds support for IPv6 IP addresses. In order to store them, you need
+to enlarge your ip_address columns to 45 characters. For example, CodeIgniter's
+session table will need to change
+
+::
+
+	ALTER TABLE ci_sessions CHANGE ip_address ip_address varchar(45) default '0' NOT NULL
\ No newline at end of file
diff --git a/user_guide_src/source/installation/upgrade_212.rst b/user_guide_src/source/installation/upgrade_212.rst
new file mode 100644
index 0000000..205ad86
--- /dev/null
+++ b/user_guide_src/source/installation/upgrade_212.rst
@@ -0,0 +1,22 @@
+#############################
+Upgrading from 2.1.1 to 2.1.2
+#############################
+
+Before performing an update you should take your site offline by
+replacing the index.php file with a static one.
+
+Step 1: Update your CodeIgniter files
+=====================================
+
+Replace all files and directories in your "system" folder and replace
+your index.php file. If any modifications were made to your index.php
+they will need to be made fresh in this new one.
+
+.. note:: If you have any custom developed files in these folders please
+	make copies of them first.
+
+Step 2: Update your user guide
+==============================
+
+Please also replace your local copy of the user guide with the new
+version.
\ No newline at end of file
diff --git a/user_guide_src/source/installation/upgrade_300.rst b/user_guide_src/source/installation/upgrade_300.rst
index c70737c..31a5c07 100644
--- a/user_guide_src/source/installation/upgrade_300.rst
+++ b/user_guide_src/source/installation/upgrade_300.rst
@@ -1,15 +1,14 @@
 #############################
-Upgrading from 2.1.0 to 3.0.0
+Upgrading from 2.1.2 to 3.0.0
 #############################
 
 .. note:: These upgrade notes are for a version that is yet to be released.
 
+Before performing an update you should take your site offline by replacing the index.php file with a static one.
 
-Before performing an update you should take your site offline by
-replacing the index.php file with a static one.
-
+*************************************
 Step 1: Update your CodeIgniter files
-=====================================
+*************************************
 
 Replace all files and directories in your "system" folder and replace
 your index.php file. If any modifications were made to your index.php
@@ -18,31 +17,154 @@
 .. note:: If you have any custom developed files in these folders please
 	make copies of them first.
 
-Step 2: Change References to the SHA Library
-============================================
+********************************
+Step 2: Replace config/mimes.php
+********************************
 
-The previously deprecated SHA library has been removed in CodeIgniter 3.0.
-Alter your code to use the native `sha1()` PHP function to generate a sha1 hash.
+This config file has been updated to contain more user mime-types, please copy
+it to _application/config/mimes.php*.
 
-Additionally, the `sha1()` method in the :doc:`Encryption Library <../libraries/encryption>` has been removed.
-
+**************************************************************
 Step 3: Remove $autoload['core'] from your config/autoload.php
-==============================================================
+**************************************************************
 
-Use of the `$autoload['core']` config array has been deprecated as of CodeIgniter 1.4.1 and is now removed.
-Move any entries that you might have listed there to `$autoload['libraries']` instead.
+Use of the ``$autoload['core']`` config array has been deprecated as of CodeIgniter 1.4.1 and is now removed.
+Move any entries that you might have listed there to ``$autoload['libraries']`` instead.
 
-Step 4: Update your config/database.php
-=======================================
+**************************************************************
+Step 4: Add new session driver items to your config/config.php
+**************************************************************
 
-Due to 3.0.0's renaming of Active Record to Query Builder, inside your _config/database.php_, you will
+With the change from a single Session Library to the new Session Driver, two new config items have been added:
+
+   -  ``$config['sess_driver']`` selects which driver to initially load. Options are:
+       -  'cookie' (the default) for classic CodeIgniter cookie-based sessions
+       -  'native' for native PHP Session support
+       -  the name of a custom driver you have provided (see :doc:`Session Driver <../libraries/sessions>` for more info)
+   -  ``$config['sess_valid_drivers']`` provides an array of additional custom drivers to make available for loading
+
+As the new Session Driver library loads the classic Cookie driver by default and always makes 'cookie' and 'native'
+available as valid drivers, neither of these configuration items are required. However, it is recommended that you
+add them for clarity and ease of configuration in the future.
+
+***************************************
+Step 5: Update your config/database.php
+***************************************
+
+Due to 3.0.0's renaming of Active Record to Query Builder, inside your `config/database.php`, you will
 need to rename the `$active_record` variable to `$query_builder`.
 
     $active_group = 'default';
     // $active_record = TRUE;
     $query_builder = TRUE;
 
-Step 5: Move your errors folder
-===============================
+*******************************
+Step 6: Move your errors folder
+*******************************
 
-In version 3.0.0, the errors folder has been moved from _application/errors_ to _application/views/errors_.
\ No newline at end of file
+In version 3.0.0, the errors folder has been moved from _application/errors* to _application/views/errors*.
+
+****************************************************************************
+Step 7: Check the calls to Array Helper's element() and elements() functions
+****************************************************************************
+
+The default return value of these functions, when the required elements
+don't exist, has been changed from FALSE to NULL.
+
+***************************************************************
+Step 8: Remove usage of (previously) deprecated functionalities
+***************************************************************
+
+In addition to the ``$autoload['core']`` configuration setting, there's a number of other functionalities
+that have been removed in CodeIgniter 3.0.0:
+
+The SHA1 library
+================
+
+The previously deprecated SHA1 library has been removed, alter your code to use PHP's native
+``sha1()`` function to generate a SHA1 hash.
+
+Additionally, the ``sha1()`` method in the :doc:`Encryption Library <../libraries/encryption>` has been removed.
+
+The EXT constant
+================
+
+Usage of the ``EXT`` constant has been deprecated since dropping support for PHP 4. There's no
+longer a need to maintain different filename extensions and in this new CodeIgniter version,
+the ``EXT`` constant has been removed. Use just '.php' instead.
+
+Smiley helper js_insert_smiley()
+================================
+
+:doc:`Smiley Helper <../helpers/smiley_helper>` function ``js_insert_smiley()`` has been deprecated
+since CodeIgniter 1.7.2 and is now removed. You'll need to switch to ``smiley_js()`` instead.
+
+Security helper do_hash()
+=========================
+
+:doc:`Security Helper <../helpers/security_helper>` function ``do_hash()`` is now just an alias for
+PHP's native ``hash()`` function. It is deprecated and scheduled for removal in CodeIgniter 3.1+.
+
+.. note:: This function is still available, but you're strongly encouraged to remove it's usage sooner
+	rather than later.
+
+File helper read_file()
+=======================
+
+:doc:`File Helper <../helpers/file_helper>` function ``read_file()`` is now just an alias for
+PHP's native ``file_get_contents()`` function. It is deprecated and scheduled for removal in
+CodeIgniter 3.1+.
+
+.. note:: This function is still available, but you're strongly encouraged to remove it's usage sooner
+	rather than later.
+
+Date helper standard_date()
+===========================
+
+:doc:`Date Helper <../helpers/date_helper>` function ``standard_date()`` is being deprecated due
+to the availability of native PHP `constants <http://www.php.net/manual/en/class.datetime.php#datetime.constants.types>`_,
+which when combined with ``date()`` provide the same functionality. Furthermore, they have the
+exact same names as the ones supported by ``standard_date()``. Here are examples of how to replace
+it's usage:
+
+::
+
+	// Old way
+	standard_date(); // defaults to standard_date('DATE_RFC822', now());
+
+	// Replacement
+	date(DATE_RFC822, now());
+
+	// Old way
+	standard_date('DATE_ATOM', $time);
+
+	// Replacement
+	date(DATE_ATOM, $time);
+
+.. note:: This function is still available, but you're strongly encouraged to remove its' usage sooner
+	rather than later as it is scheduled for removal in CodeIgniter 3.1+.
+
+Pagination library 'anchor_class' setting
+=========================================
+
+The :doc:`Pagination Library <../libraries/pagination>` now supports adding pretty much any HTML
+attribute to your anchors via the 'attributes' configuration setting. This includes passing the
+'class' attribute and using the separate 'anchor_class' setting no longer makes sense.
+As a result of that, the 'anchor_class' setting is now deprecated and scheduled for removal in
+CodeIgniter 3.1+.
+
+.. note:: This setting is still available, but you're strongly encouraged to remove its' usage sooner
+	rather than later.
+
+Email library
+=============
+
+The :doc:`Email library <../libraries/email>` will automatically clear the set parameters after successfully sending
+emails. To override this behaviour, pass FALSE as the first parameter in the ``send()`` function:
+
+::
+
+	if ($this->email->send(FALSE))
+ 	{
+ 		// Parameters won't be cleared
+ 	}
diff --git a/user_guide_src/source/installation/upgrading.rst b/user_guide_src/source/installation/upgrading.rst
index 255c6a5..545f344 100644
--- a/user_guide_src/source/installation/upgrading.rst
+++ b/user_guide_src/source/installation/upgrading.rst
@@ -5,8 +5,10 @@
 Please read the upgrade notes corresponding to the version you are
 upgrading from.
 
--  :doc:`Upgrading from 2.1.1 to 3.0.0 <upgrade_300>`
+-  :doc:`Upgrading from 2.1.2 to 3.0.0 <upgrade_300>`
+-  :doc:`Upgrading from 2.1.1 to 2.1.2 <upgrade_212>`
 -  :doc:`Upgrading from 2.1.0 to 2.1.1 <upgrade_211>`
+-  :doc:`Upgrading from 2.0.3 to 2.1.0 <upgrade_210>`
 -  :doc:`Upgrading from 2.0.2 to 2.0.3 <upgrade_203>`
 -  :doc:`Upgrading from 2.0.1 to 2.0.2 <upgrade_202>`
 -  :doc:`Upgrading from 2.0 to 2.0.1 <upgrade_201>`
diff --git a/user_guide_src/source/libraries/config.rst b/user_guide_src/source/libraries/config.rst
index 6948963..08d9c29 100644
--- a/user_guide_src/source/libraries/config.rst
+++ b/user_guide_src/source/libraries/config.rst
@@ -175,7 +175,7 @@
 as to a stylesheet or image.
 
 The two functions above are normally accessed via the corresponding
-functions in the :doc:`URL Helper <helpers/url_helper>`.
+functions in the :doc:`URL Helper </helpers/url_helper>`.
 
 $this->config->system_url();
 *****************************
diff --git a/user_guide_src/source/libraries/email.rst b/user_guide_src/source/libraries/email.rst
index 8d2549d..fc324ff 100644
--- a/user_guide_src/source/libraries/email.rst
+++ b/user_guide_src/source/libraries/email.rst
@@ -190,7 +190,7 @@
 extract the message from your HTML email and strip the tags.
 
 $this->email->set_header()
------------------------
+--------------------------
 
 Appends additional headers to the e-mail::
 
@@ -233,6 +233,14 @@
 	    // Generate error
 	}
 
+This function will automatically clear all parameters if the request was
+successful. To stop this behaviour pass FALSE::
+
+ 	if ($this->email->send(FALSE))
+ 	{
+ 		// Parameters won't be cleared
+ 	}
+
 $this->email->attach()
 ----------------------
 
diff --git a/user_guide_src/source/libraries/file_uploading.rst b/user_guide_src/source/libraries/file_uploading.rst
index 65cd5c7..1698dcb 100644
--- a/user_guide_src/source/libraries/file_uploading.rst
+++ b/user_guide_src/source/libraries/file_uploading.rst
@@ -197,6 +197,7 @@
                                                                        Separate multiple types with a pipe.
 **file_name**                None              Desired file name       If set CodeIgniter will rename the uploaded file to this name. The
                                                                        extension provided in the file name must also be an allowed file type.
+                                                                       If no extension is provided in the original file_name will be used.
 **overwrite**                FALSE             TRUE/FALSE (boolean)    If set to true, if a file with the same name as the one you are
                                                                        uploading exists, it will be overwritten. If set to false, a number will
                                                                        be appended to the filename if another with the same name exists.
diff --git a/user_guide_src/source/libraries/form_validation.rst b/user_guide_src/source/libraries/form_validation.rst
index 3bcad7b..faf2219 100644
--- a/user_guide_src/source/libraries/form_validation.rst
+++ b/user_guide_src/source/libraries/form_validation.rst
@@ -861,8 +861,9 @@
 ========================= ========== ============================================================================================= =======================
 **required**              No         Returns FALSE if the form element is empty.                                                                          
 **matches**               Yes        Returns FALSE if the form element does not match the one in the parameter.                    matches[form_item]     
-**is_unique**             Yes        Returns FALSE if the form element is not unique to the                                        is_unique[table.field] 
-                                     table and field name in the parameter. is_unique[table.field]                                                        
+**is_unique**             Yes        Returns FALSE if the form element is not unique to the table and field name in the            is_unique[table.field] 
+                                     parameter. Note: This rule requires :doc:`Query Builder <database/query_builder>` to be                             
+                                     enabled in order to work.
 **max_length**            Yes        Returns FALSE if the form element is longer then the parameter value.                         max_length[12]         
 **exact_length**          Yes        Returns FALSE if the form element is not exactly the parameter value.                         exact_length[8]        
 **greater_than**          Yes        Returns FALSE if the form element is less than or equal to the parameter value or not         greater_than[8]
@@ -884,7 +885,6 @@
                                      0, 1, 2, 3, etc.
 **is_natural_no_zero**    No         Returns FALSE if the form element contains anything other than a natural
                                      number, but not zero: 1, 2, 3, etc.
-**is_unique**             Yes        Returns FALSE if the form element is not unique in a database table.                          is_unique[table.field] 
 **valid_email**           No         Returns FALSE if the form element does not contain a valid email address.
 **valid_emails**          No         Returns FALSE if any value provided in a comma separated list is not a valid email.
 **valid_ip**              No         Returns FALSE if the supplied IP is not valid.
diff --git a/user_guide_src/source/libraries/ftp.rst b/user_guide_src/source/libraries/ftp.rst
index 20b11a5..05a3fdc 100644
--- a/user_guide_src/source/libraries/ftp.rst
+++ b/user_guide_src/source/libraries/ftp.rst
@@ -26,7 +26,7 @@
 
 In this example a connection is opened to the FTP server, and a local
 file is read and uploaded in ASCII mode. The file permissions are set to
-755. Note: Setting permissions requires PHP 5.
+755.
 
 ::
 
@@ -136,8 +136,7 @@
 **Mode options are:** ascii, binary, and auto (the default). If auto is
 used it will base the mode on the file extension of the source file.
 
-Permissions are available if you are running PHP 5 and can be passed as
-an octal value in the fourth parameter.
+If set, permissions have to be passed as an octal value.
 
 $this->ftp->download()
 ======================
diff --git a/user_guide_src/source/libraries/image_lib.rst b/user_guide_src/source/libraries/image_lib.rst
index ed6575c..dcdccbd 100644
--- a/user_guide_src/source/libraries/image_lib.rst
+++ b/user_guide_src/source/libraries/image_lib.rst
@@ -91,9 +91,9 @@
 	    echo $this->image_lib->display_errors();
 	}
 
-Note: You can optionally specify the HTML formatting to be applied to
-the errors, by submitting the opening/closing tags in the function, like
-this::
+.. note:: You can optionally specify the HTML formatting to be applied to
+	the errors, by submitting the opening/closing tags in the function,
+	like this::
 
 	$this->image_lib->display_errors('<p>', '</p>');
 
@@ -225,8 +225,7 @@
 	$config['y_axis'] = '40';
 
 All preferences listed in the table above are available for this
-function except these: rotation_angle, width, height, create_thumb,
-new_image.
+function except these: rotation_angle, create_thumb, new_image.
 
 Here's an example showing how you might crop an image::
 
@@ -243,11 +242,11 @@
 	    echo $this->image_lib->display_errors();
 	}
 
-Note: Without a visual interface it is difficult to crop images, so this
-function is not very useful unless you intend to build such an
-interface. That's exactly what we did using for the photo gallery module
-in ExpressionEngine, the CMS we develop. We added a JavaScript UI that
-lets the cropping area be selected.
+.. note:: Without a visual interface it is difficult to crop images, so this
+	function is not very useful unless you intend to build such an
+	interface. That's exactly what we did using for the photo gallery module
+	in ExpressionEngine, the CMS we develop. We added a JavaScript UI that
+	lets the cropping area be selected.
 
 $this->image_lib->rotate()
 ===========================
@@ -338,8 +337,8 @@
 bottom/center of the image, 20 pixels from the bottom of the image.
 
 .. note:: In order for the image class to be allowed to do any
-	processing, the image file must have "write" file permissions. For
-	example, 777.
+	processing, the image file must have "write" file permissions
+	For example, 777.
 
 Watermarking Preferences
 ========================
diff --git a/user_guide_src/source/libraries/loader.rst b/user_guide_src/source/libraries/loader.rst
index aadf974..615aba1 100644
--- a/user_guide_src/source/libraries/loader.rst
+++ b/user_guide_src/source/libraries/loader.rst
@@ -4,6 +4,7 @@
 
 Loader, as the name suggests, is used to load elements. These elements
 can be libraries (classes) :doc:`View files <../general/views>`,
+:doc:`Drivers <../general/drivers>`,
 :doc:`Helpers <../general/helpers>`,
 :doc:`Models <../general/models>`, or your own files.
 
@@ -74,6 +75,70 @@
 
 If the third (optional) parameter is blank, the library will usually be
 assigned to an object with the same name as the library. For example, if
+the library is named Calendar, it will be assigned to a variable named
+$this->calendar.
+
+If you prefer to set your own class names you can pass its value to the
+third parameter::
+
+	$this->load->library('calendar', '', 'my_calendar');
+
+	// Calendar class is now accessed using:
+
+	$this->my_calendar
+
+Please take note, when multiple libraries are supplied in an array for
+the first parameter, this parameter is discarded.
+
+$this->load->driver('parent_name', $config, 'object name')
+===========================================================
+
+This function is used to load driver libraries. Where parent_name is the
+name of the parent class you want to load.
+
+As an example, if you would like to use sessions with CodeIgniter, the first
+step is to load the session driver within your controller::
+
+	$this->load->driver('session');
+
+Once loaded, the library will be ready for use, using
+$this->session->*some_function*().
+
+Driver files must be stored in a subdirectory within the main
+"libraries" folder, or within your personal application/libraries
+folder. The subdirectory must match the parent class name. Read the
+:doc:`Drivers <../general/drivers>` description for details.
+
+Additionally, multiple driver libraries can be loaded at the same time by
+passing an array of drivers to the load function.
+
+::
+
+	$this->load->driver(array('session', 'cache'));
+
+Setting options
+---------------
+
+The second (optional) parameter allows you to optionally pass
+configuration settings. You will typically pass these as an array::
+
+	$config = array (
+	                  'sess_driver' => 'cookie',
+	                  'sess_encrypt_cookie'  => true,
+	                  'encryption_key' => 'mysecretkey'
+	               );
+
+	$this->load->driver('session', $config);
+
+Config options can usually also be set via a config file. Each library
+is explained in detail in its own page, so please read the information
+regarding each one you would like to use.
+
+Assigning a Driver to a different object name
+----------------------------------------------
+
+If the third (optional) parameter is blank, the library will be assigned
+to an object with the same name as the parent class. For example, if
 the library is named Session, it will be assigned to a variable named
 $this->session.
 
@@ -86,8 +151,8 @@
 
 	$this->my_session
 
-Please take note, when multiple libraries are supplied in an array for
-the first parameter, this parameter is discarded.
+.. note:: Driver libraries may also be loaded with the library() method,
+	but it is faster to use driver()
 
 $this->load->view('file_name', $data, true/false)
 ==================================================
@@ -279,6 +344,6 @@
 	$this->load->remove_package_path(APPPATH.'my_app');
 
 	// Again without the second parameter:
-	$this->load->add_package_path(APPPATH.'my_app', TRUE);
+	$this->load->add_package_path(APPPATH.'my_app');
 	$this->load->view('my_app_index'); // Loads
-	$this->load->view('welcome_message'); // Loads
\ No newline at end of file
+	$this->load->view('welcome_message'); // Loads
diff --git a/user_guide_src/source/libraries/migration.rst b/user_guide_src/source/libraries/migration.rst
index 5192f1f..cb7d96a 100644
--- a/user_guide_src/source/libraries/migration.rst
+++ b/user_guide_src/source/libraries/migration.rst
@@ -2,4 +2,136 @@
 Migrations Class
 ################
 
-Coming soon.
\ No newline at end of file
+Migrations are a convenient way for you to alter your database in a 
+structured and organized manner. You could edit fragments of SQL by hand 
+but you would then be responsible for telling other developers that they 
+need to go and run them. You would also have to keep track of which changes 
+need to be run against the production machines next time you deploy.
+
+The database table **migration** tracks which migrations have already been 
+run so all you have to do is update your application files and 
+call **$this->migrate->current()** to work out which migrations should be run. 
+The current version is found in **config/migration.php**.
+
+******************
+Create a Migration
+******************
+
+.. note:: Each Migration is run in numerical order forward or backwards 
+	depending on the method taken. Use a prefix of 3 numbers followed by an 
+	underscore for the filename of your migration.
+	
+This will be the first migration for a new site which has a blog. All 
+migrations go in the folder **application/migrations/** and have names such 
+as: **001_add_blog.php**.::
+
+	defined('BASEPATH') OR exit('No direct script access allowed');
+
+	class Migration_Add_blog extends CI_Migration {
+
+		public function up()
+		{
+			$this->dbforge->add_field(array(
+				'blog_id' => array(
+					'type' => 'INT',
+					'constraint' => 5,
+					'unsigned' => TRUE,
+					'auto_increment' => TRUE
+				),
+				'blog_title' => array(
+					'type' => 'VARCHAR',
+					'constraint' => '100',
+				),
+				'blog_description' => array(
+					'type' => 'TEXT',
+					'null' => TRUE,
+				),
+			));
+			
+			$this->dbforge->create_table('blog');
+		}
+
+		public function down()
+		{
+			$this->dbforge->drop_table('blog');
+		}
+
+Then in **application/config/migration.php** set **$config['migration_version'] = 1;**.
+
+*************
+Usage Example
+*************
+
+In this example some simple code is placed in **application/controllers/migrate.php** 
+to update the schema.::
+
+	$this->load->library('migration');
+
+	if ( ! $this->migration->current())
+	{
+		show_error($this->migration->error_string());
+	}
+
+******************
+Function Reference
+******************
+
+There are five available methods for the Migration class:
+
+-  $this->migration->current();
+-  $this->migration->error_string();
+-  $this->migration->find_migrations();
+-  $this->migration->latest();
+-  $this->migration->version();
+
+$this->migration->current()
+============================
+
+The current migration is whatever is set for **$config['migration_version']** in 
+**application/config/migration.php**.
+
+$this->migration->error_string()
+=================================
+
+This returns a string of errors while performing a migration.
+
+$this->migration->find_migrations()
+====================================
+
+An array of migration filenames are returned that are found in the **migration_path** 
+property.
+
+$this->migration->latest()
+===========================
+
+This works much the same way as current() but instead of looking for 
+the **$config['migration_version']** the Migration class will use the very 
+newest migration found in the filesystem.
+
+$this->migration->version()
+============================
+
+Version can be used to roll back changes or step forwards programmatically to 
+specific versions. It works just like current but ignores **$config['migration_version']**.::
+
+	$this->load->library('migration');
+
+	$this->migration->version(5);
+
+*********************
+Migration Preferences
+*********************
+
+The following is a table of all the config options for migrations.
+
+========================== ====================== ============= =============================================
+Preference                 Default                Options       Description
+========================== ====================== ============= =============================================
+**migration_enabled**      FALSE                  TRUE / FALSE  Enable or disable migrations.
+**migration_path**         APPPATH.'migrations/'  None          The path to your migrations folder.
+**migration_version**      0                      None          The current version your database should use.
+**migration_table**        migrations             None          The table name for storing the shema
+                                                                version number.
+**migration_auto_latest**  FALSE                  TRUE / FALSE  Enable or disable automatically 
+                                                                running migrations.
+========================== ====================== ============= =============================================
diff --git a/user_guide_src/source/libraries/pagination.rst b/user_guide_src/source/libraries/pagination.rst
index 6e1020b..00554c1 100644
--- a/user_guide_src/source/libraries/pagination.rst
+++ b/user_guide_src/source/libraries/pagination.rst
@@ -80,7 +80,7 @@
 page number. For example, the number 2 will place two digits on either
 side, as in the example links at the very top of this page.
 
-$config['use_page_number'] = TRUE;
+$config['use_page_numbers'] = TRUE;
 ==================================
 
 By default, the URI segment will use the starting index for the items
@@ -113,7 +113,7 @@
 configured using $config['query_string_segment'] = 'your_string'
 
 $config['reuse_query_string'] = FALSE;
-====================================
+======================================
 
 By default your Query String arguments (nothing to do with other
 query string options) will be ignored. Setting this config to
diff --git a/user_guide_src/source/libraries/sessions.rst b/user_guide_src/source/libraries/sessions.rst
index 5400524..dd9e8cb 100644
--- a/user_guide_src/source/libraries/sessions.rst
+++ b/user_guide_src/source/libraries/sessions.rst
@@ -1,29 +1,19 @@
-#############
-Session Class
-#############
+##############
+Session Driver
+##############
 
 The Session class permits you maintain a user's "state" and track their
-activity while they browse your site. The Session class stores session
-information for each user as serialized (and optionally encrypted) data
-in a cookie. It can also store the session data in a database table for
-added security, as this permits the session ID in the user's cookie to
-be matched against the stored session ID. By default only the cookie is
-saved. If you choose to use the database option you'll need to create
-the session table as indicated below.
-
-.. note:: The Session class does **not** utilize native PHP sessions. It
-	generates its own session data, offering more flexibility for
-	developers.
-
-.. note:: Even if you are not using encrypted sessions, you must set
-	an :doc:`encryption key <./encryption>` in your config file which is used
-	to aid in preventing session data manipulation.
+activity while they browse your site. CodeIgniter offers two default
+session drivers: the classic `Cookie Driver`_, and the `Native Driver`_,
+which supports usage of the native PHP Session mechanism. In addition,
+you may create your own `Custom Drivers`_ to store session data however
+you wish, while still taking advantage of the features of the Session class.
 
 Initializing a Session
 ======================
 
 Sessions will typically run globally with each page load, so the session
-class must either be :doc:`initialized <../general/libraries>` in your
+class must either be :doc:`initialized <../general/drivers>` in your
 :doc:`controller <../general/controllers>` constructors, or it can be
 :doc:`auto-loaded <../general/autoloader>` by the system. For the most
 part the session class will run unattended in the background, so simply
@@ -31,22 +21,25 @@
 sessions.
 
 To initialize the Session class manually in your controller constructor,
-use the $this->load->library function::
+use the $this->load->driver function::
 
-	$this->load->library('session');
+	$this->load->driver('session');
 
 Once loaded, the Sessions library object will be available using:
 $this->session
 
+.. note:: For backward compatibility, the Session class may stil be loaded
+	using the $this->load->library function, but converting your applications
+	to use $this->load->driver is strongly recommended.
+
 How do Sessions work?
 =====================
 
 When a page is loaded, the session class will check to see if valid
-session data exists in the user's session cookie. If sessions data does
-**not** exist (or if it has expired) a new session will be created and
-saved in the cookie. If a session does exist, its information will be
-updated and the cookie will be updated. With each update, the
-session_id will be regenerated.
+session data exists in the user's session. If sessions data does **not**
+exist (or if it has expired) a new session will be created and saved.
+If a session does exist, its information will be updated. With each update,
+the session_id will be regenerated.
 
 It's important for you to understand that once initialized, the Session
 class runs automatically. There is nothing you need to do to cause the
@@ -79,19 +72,12 @@
 	     'last_activity' => timestamp
 	)
 
-If you have the encryption option enabled, the serialized array will be
-encrypted before being stored in the cookie, making the data highly
-secure and impervious to being read or altered by someone. More info
-regarding encryption can be :doc:`found here <encryption>`, although
-the Session class will take care of initializing and encrypting the data
-automatically.
-
-Note: Session cookies are only updated every five minutes by default to
-reduce processor load. If you repeatedly reload a page you'll notice
-that the "last activity" time only updates if five minutes or more has
-passed since the last time the cookie was written. This time is
-configurable by changing the $config['sess_time_to_update'] line in
-your system/config/config.php file.
+.. note:: Sessions are only updated every five minutes by default to
+	reduce processor load. If you repeatedly reload a page you'll notice
+	that the "last activity" time only updates if five minutes or more has
+	passed since the last time the cookie was written. This time is
+	configurable by changing the $config['sess_time_to_update'] line in
+	your system/config/config.php file.
 
 Retrieving Session Data
 =======================
@@ -106,7 +92,7 @@
 
 	$session_id = $this->session->userdata('session_id');
 
-.. note:: The function returns FALSE (boolean) if the item you are
+.. note:: The function returns NULL if the item you are
 	trying to access does not exist.
 
 Adding Custom Session Data
@@ -117,7 +103,7 @@
 do this? Here's one example:
 
 Let's say a particular user logs into your site. Once authenticated, you
-could add their username and email address to the session cookie, making
+could add their username and email address to the session, making
 that data globally available to you without having to run a database
 query when you need it.
 
@@ -144,11 +130,11 @@
 
 	$this->session->set_userdata('some_name', 'some_value');
 
+If you want to verify that a userdata value exists, call has_userdata().
 
-.. note:: Cookies can only hold 4KB of data, so be careful not to exceed
-	the capacity. The encryption process in particular produces a longer
-	data string than the original so keep careful track of how much data you
-	are storing.
+::
+
+	$this->session->has_userdata('some_name');
 
 Retrieving All Session Data
 ===========================
@@ -195,8 +181,8 @@
 cleared. These can be very useful, and are typically used for
 informational or status messages (for example: "record 2 deleted").
 
-Note: Flash variables are prefaced with "flash\_" so avoid this prefix
-in your own session names.
+.. note:: Flash variables are prefaced with "flash\_" so avoid this prefix
+	in your own session names.
 
 To add flashdata::
 
@@ -222,9 +208,162 @@
 
 	$this->session->keep_flashdata('item');
 
+Tempdata
+========
+
+CodeIgniter also supports "tempdata", or session data with a specific
+expiration time. After the value expires, or the session expires or is
+deleted, the value is automatically removed.
+
+To add tempdata::
+
+	$expire = 300;	// Expire in 5 minutes
+
+	$this->session->set_tempdata('item', 'value', $expire);
+
+You can also pass an array to set_tempdata()::
+
+	$tempdata = array('newuser' => TRUE, 'message' => 'Thanks for joining!');
+
+	$this->session->set_tempdata($tempdata, '', $expire);
+
+.. note:: If the expiration is omitted or set to 0, the default expiration of
+	5 minutes will be used.
+
+To read a tempdata variable::
+
+	$this->session->tempdata('item');
+
+If you need to remove a tempdata value before it expires,
+use unset_tempdata()::
+
+	$this->session->unset_tempdata('item');
+
+Destroying a Session
+====================
+
+To clear the current session::
+
+	$this->session->sess_destroy();
+
+.. note:: This function should be the last one called, and even flash
+	variables will no longer be available. If you only want some items
+	destroyed and not all, use unset_userdata().
+
+Session Preferences
+===================
+
+You'll find the following Session related preferences in your
+application/config/config.php file:
+
+=========================== =============== =========================== ==========================================================================
+Preference                  Default         Options                     Description
+=========================== =============== =========================== ==========================================================================
+**sess_driver**             cookie          cookie/native/*custom*      The initial session driver to load.
+**sess_valid_drivers**      cookie, native  None                        Additional valid drivers which may be loaded.
+**sess_cookie_name**        ci_session      None                        The name you want the session cookie saved as (data for Cookie driver or
+                                                                        session ID for Native driver).
+**sess_expiration**         7200            None                        The number of seconds you would like the session to last. The default
+                                                                        value is 2 hours (7200 seconds). If you would like a non-expiring
+                                                                        session set the value to zero: 0
+**sess_expire_on_close**    FALSE           TRUE/FALSE (boolean)        Whether to cause the session to expire automatically when the browser
+                                                                        window is closed.
+**sess_encrypt_cookie**     FALSE           TRUE/FALSE (boolean)        Whether to encrypt the session data (Cookie driver only).
+**sess_use_database**       FALSE           TRUE/FALSE (boolean)        Whether to save the session data to a database. You must create the
+                                                                        table before enabling this option (Cookie driver only).
+**sess_table_name**         ci_sessions     Any valid SQL table name    The name of the session database table (Cookie driver only).
+**sess_time_to_update**     300             Time in seconds             This options controls how often the session class will regenerate itself
+                                                                        and create a new session id.
+**sess_match_ip**           FALSE           TRUE/FALSE (boolean)        Whether to match the user's IP address when reading the session data.
+                                                                        Note that some ISPs dynamically changes the IP, so if you want a
+                                                                        non-expiring session you will likely set this to FALSE.
+**sess_match_useragent**    TRUE            TRUE/FALSE (boolean)        Whether to match the User Agent when reading the session data.
+=========================== =============== =========================== ==========================================================================
+
+In addition to the values above, the cookie and native drivers apply the
+following configuration values shared by the :doc:`Input <input>` and
+:doc:`Security <security>` classes:
+
+=========================== =============== ==========================================================================
+Preference                  Default         Description
+=========================== =============== ==========================================================================
+**cookie_prefix**           ''              Set a cookie name prefix in order to avoid name collisions
+**cookie_domain**           ''              The domain for which the session is applicable
+**cookie_path**             /               The path to which the session is applicable
+=========================== =============== ==========================================================================
+
+Session Drivers
+===============
+
+By default, the `Cookie Driver`_ is loaded when a session is initialized.
+However, any valid driver may be selected with the $config['sess_driver']
+line in your config.php file.
+
+The session driver library comes with the cookie and native drivers
+installed, and `Custom Drivers`_ may also be installed by the user.
+
+Typically, only one driver will be used at a time, but CodeIgniter does
+support loading multiple drivers. If a specific valid driver is called, it
+will be automatically loaded. Or, an additional driver may be explicitly
+loaded by calling load_driver()::
+
+	$this->session->load_driver('native');
+
+The Session library keeps track of the most recently selected driver to call
+for driver methods. Normally, session class methods are called directly on
+the parent class, as illustrated above. However, any methods called through
+a specific driver will select that driver before invoking the parent method.
+
+So, alternation between multiple drivers can be achieved by specifying which
+driver to use for each call::
+
+	$this->session->native->set_userdata('foo', 'bar');
+
+	$this->session->cookie->userdata('foo');
+
+	$this->session->native->unset_userdata('foo');
+
+Notice in the previous example that the *native* userdata value 'foo'
+would be set to 'bar', which would NOT be returned by the call for
+the *cookie* userdata 'foo', nor would the *cookie* value be unset by
+the call to unset the *native* 'foo' value. The drivers maintain independent
+sets of values, regardless of key names.
+
+A specific driver may also be explicitly selected for use by pursuant
+methods with the select_driver() call::
+
+	$this->session->select_driver('native');
+
+	$this->session->userdata('item');	// Uses the native driver
+
+Cookie Driver
+-------------
+
+The Cookie driver stores session information for each user as serialized
+(and optionally encrypted) data in a cookie. It can also store the session
+data in a database table for added security, as this permits the session ID
+in the user's cookie to be matched against the stored session ID. By default
+only the cookie is saved. If you choose to use the database option you'll
+need to create the session table as indicated below.
+
+If you have the encryption option enabled, the serialized array will be
+encrypted before being stored in the cookie, making the data highly
+secure and impervious to being read or altered by someone. More info
+regarding encryption can be :doc:`found here <encryption>`, although
+the Session class will take care of initializing and encrypting the data
+automatically.
+
+.. note:: Even if you are not using encrypted sessions, you must set
+	an :doc:`encryption key <./encryption>` in your config file which is used
+	to aid in preventing session data manipulation.
+
+.. note:: Cookies can only hold 4KB of data, so be careful not to exceed
+	the capacity. The encryption process in particular produces a longer
+	data string than the original so keep careful track of how much data you
+	are storing.
 
 Saving Session Data to a Database
-=================================
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 While the session data array stored in the user's cookie contains a
 Session ID, unless you store session data in a database there is no way
@@ -267,44 +406,83 @@
 
 		$config['sess_table_name'] = 'ci_sessions';
 
-.. note:: The Session class has built-in garbage collection which clears
+.. note:: The Cookie driver has built-in garbage collection which clears
 	out expired sessions so you do not need to write your own routine to do
 	it.
 
-Destroying a Session
-====================
+Native Driver
+-------------
 
-To clear the current session::
+The Native driver relies on native PHP sessions to store data in the
+$_SESSION superglobal array. All stored values continue to be available
+through $_SESSION, but flash- and temp- data items carry special prefixes.
 
-	$this->session->sess_destroy();
+Custom Drivers
+--------------
 
-.. note:: This function should be the last one called, and even flash
-	variables will no longer be available. If you only want some items
-	destroyed and not all, use unset_userdata().
+You may also :doc:`create your own <../general/creating_drivers>` custom
+session drivers. A session driver basically manages an array of name/value
+pairs with some sort of storage mechanism.
 
-Session Preferences
-===================
+To make a new driver, extend CI_Session_driver. Overload the initialize()
+method and read or create session data. Then implement a save handler to
+write changed data to storage (sess_save), a destroy handler to remove
+deleted data (sess_destroy), a regenerate handler to make a new session ID
+(sess_regenerate), and an access handler to expose the data (get_userdata).
+Your initial class might look like::
 
-You'll find the following Session related preferences in your
-application/config/config.php file:
+	class CI_Session_custom extends CI_Session_driver {
+		protected function initialize()
+		{
+			// Read existing session data or create a new one
+		}
 
-=========================== =============== =========================== ==========================================================================
-Preference                  Default         Options                     Description
-=========================== =============== =========================== ==========================================================================
-**sess_cookie_name**        ci_session      None                        The name you want the session cookie saved as.
-**sess_expiration**         7200            None                        The number of seconds you would like the session to last. The default
-                                                                        value is 2 hours (7200 seconds). If you would like a non-expiring
-                                                                        session set the value to zero: 0
-**sess_expire_on_close**    FALSE           TRUE/FALSE (boolean)        Whether to cause the session to expire automatically when the browser
-                                                                        window is closed.
-**sess_encrypt_cookie**     FALSE           TRUE/FALSE (boolean)        Whether to encrypt the session data.
-**sess_use_database**       FALSE           TRUE/FALSE (boolean)        Whether to save the session data to a database. You must create the
-                                                                        table before enabling this option.
-**sess_table_name**         ci_sessions     Any valid SQL table name    The name of the session database table.
-**sess_time_to_update**     300             Time in seconds             This options controls how often the session class will regenerate itself
-                                                                        and create a new session id.
-**sess_match_ip**           FALSE           TRUE/FALSE (boolean)        Whether to match the user's IP address when reading the session data.
-                                                                        Note that some ISPs dynamically changes the IP, so if you want a
-                                                                        non-expiring session you will likely set this to FALSE.
-**sess_match_useragent**    TRUE            TRUE/FALSE (boolean)        Whether to match the User Agent when reading the session data.
-=========================== =============== =========================== ==========================================================================
\ No newline at end of file
+		public function sess_save()
+		{
+			// Save current data to storage
+		}
+
+		public function sess_destroy()
+		{
+			// Destroy the current session and clean up storage
+		}
+
+		public function sess_regenerate()
+		{
+			// Create new session ID
+		}
+
+		public function &get_userdata()
+		{
+			// Return a reference to your userdata array
+		}
+	}
+
+Notice that get_userdata() returns a reference so the parent library is
+accessing the same array the driver object is using. This saves memory
+and avoids synchronization issues during usage.
+
+Put your driver in the libraries/Session/drivers folder anywhere in your
+package paths. This includes the application directory, the system directory,
+or any path you add with $CI->load->add_package_path(). Your driver must be
+named CI_Session_<name>, and your filename must be Session_<name>.php,
+preferably also capitalized, such as::
+
+	CI_Session_foo in libraries/Session/drivers/Session_foo.php
+
+Then specify the driver by setting 'sess_driver' in your config.php file or as a
+parameter when loading the CI_Session object::
+
+	$config['sess_driver'] = 'foo';
+
+OR::
+
+	$CI->load->driver('session', array('sess_driver' => 'foo'));
+
+The driver specified by 'sess_driver' is automatically included as a valid
+driver. However, if you want to make a custom driver available as an option
+without making it the initially loaded driver, set 'sess_valid_drivers' in
+your config.php file to an array including your driver name::
+
+	$config['sess_valid_drivers'] = array('sess_driver');
+
diff --git a/user_guide_src/source/libraries/trackback.rst b/user_guide_src/source/libraries/trackback.rst
index 07b2b21..f9e0df8 100644
--- a/user_guide_src/source/libraries/trackback.rst
+++ b/user_guide_src/source/libraries/trackback.rst
@@ -114,7 +114,7 @@
 	 excerpt text NOT NULL,
 	 blog_name varchar(100) NOT NULL,
 	 tb_date int(10) NOT NULL,
-	 ip_address varchar(16) NOT NULL,
+	 ip_address varchar(45) NOT NULL,
 	 PRIMARY KEY `tb_id` (`tb_id`),
 	 KEY `entry_id` (`entry_id`)
 	);
diff --git a/license_afl.rst b/user_guide_src/source/license_afl.rst
similarity index 100%
rename from license_afl.rst
rename to user_guide_src/source/license_afl.rst
diff --git a/user_guide_src/source/overview/cheatsheets.rst b/user_guide_src/source/overview/cheatsheets.rst
index 2e277aa..80c3112 100644
--- a/user_guide_src/source/overview/cheatsheets.rst
+++ b/user_guide_src/source/overview/cheatsheets.rst
@@ -5,12 +5,19 @@
 Library Reference
 =================
 
-`|CodeIgniter Library
-Reference| <../images/codeigniter_1.7.1_library_reference.pdf>`_
+|CodeIgniter Library Reference|
+
+-  :download:`Download PDF <../images/codeigniter_1.7.1_library_reference.pdf>`
+
 Helpers Reference
 =================
 
-`|image1| <../images/codeigniter_1.7.1_helper_reference.pdf>`_
+|CodeIgniter Helper Reference|
+
+-  :download:`Download PDF <../images/codeigniter_1.7.1_helper_reference.pdf>`
+
 
 .. |CodeIgniter Library Reference| image:: ../images/codeigniter_1.7.1_library_reference.png
-.. |image1| image:: ../images/codeigniter_1.7.1_helper_reference.png
+   :target: ../_downloads/codeigniter_1.7.1_library_reference.pdf
+.. |CodeIgniter Helper Reference| image:: ../images/codeigniter_1.7.1_helper_reference.png
+   :target: ../_downloads/codeigniter_1.7.1_helper_reference.pdf