diff --git a/application/config/mimes.php b/application/config/mimes.php
index a239bb2..48771dc 100644
--- a/application/config/mimes.php
+++ b/application/config/mimes.php
@@ -56,7 +56,7 @@
 	'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 +123,8 @@
 	'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'),
+	'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 9befddc..78e4c8c 100644
--- a/application/config/user_agents.php
+++ b/application/config/user_agents.php
@@ -157,10 +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/system/database/drivers/postgre/postgre_driver.php b/system/database/drivers/postgre/postgre_driver.php
index 0317408..8c11c47 100644
--- a/system/database/drivers/postgre/postgre_driver.php
+++ b/system/database/drivers/postgre/postgre_driver.php
@@ -132,7 +132,15 @@
 	 */
 	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;
 	}
 
 	// --------------------------------------------------------------------
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/html_helper.php b/system/helpers/html_helper.php
index 9843e80..2372e81 100644
--- a/system/helpers/html_helper.php
+++ b/system/helpers/html_helper.php
@@ -215,7 +215,7 @@
 			}
 		}
 
-		return $img._stringify_attributes($attributes).'/>';
+		return $img._stringify_attributes($attributes).' />';
 	}
 }
 
diff --git a/user_guide_src/source/_themes/eldocs/layout.html b/user_guide_src/source/_themes/eldocs/layout.html
index 01db07c..51d61b8 100644
--- a/user_guide_src/source/_themes/eldocs/layout.html
+++ b/user_guide_src/source/_themes/eldocs/layout.html
@@ -91,13 +91,7 @@
 		</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) }}">User Guide Home</a>{%- if pagename != 'index' %}&nbsp;&nbsp;{{ reldelim1 }}{%- endif %}</li>
@@ -113,8 +107,10 @@
 			</ul>
 		</div><!-- /#header -->
 
-		<div class="section" id="content">
+		<div class="section body" id="content">
+			{%- block body %}
 			{{ body }}
+			{%- endblock %}
 		</div>
 	{%- endblock %}
 
@@ -125,8 +121,8 @@
 	{%- block footer %}			
 		<div id="footer">
 			<p class="top"><a href="#header" title="Return to top">Return to top</a></p>
-			<p><a href="{{ project_url }}">{{ project }}</a> &ndash; Copyright &copy; {{ copyright }}</a></p>
+			<p><a href="http://{{ project_domain }}/">{{ project }}</a> &ndash; Copyright &copy; {{ copyright }}</a></p>
 		</div><!-- /#footer -->
 	{%- endblock %}
 	</body>
-</html>
+</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 6cabda0..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
@@ -148,6 +148,8 @@
 
 .top{ float: right; }
 
+.highlight{ overflow-x: auto; }
+
 .admonition,
 .highlight-ee,
 .highlight-ci,
@@ -166,6 +168,8 @@
 	padding: 10px 10px 8px; 
 }
 
+.highlight-ci{ background-color: #FEFEFE; border-color: #E5E5E5; }
+
 	.admonition p{ margin: 0; }
 	
 	.codeblock{ margin: 10px 0; }
@@ -181,6 +185,8 @@
 }
 
 .admonition-title:after{ content: ':  '; }
+
+.highlighted{ background-color: #FFF09B; }
 	
 #table-contents{
 	bottom: 0;
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 03df6e3..77c018a 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -34,6 +34,7 @@
    -  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.
@@ -102,12 +103,13 @@
    -  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().
@@ -138,7 +140,7 @@
    -  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 capability for packages to hold database.php config files
    -  Added subdrivers support (currently only used by PDO).
 
 -  Libraries
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/installation/upgrade_300.rst b/user_guide_src/source/installation/upgrade_300.rst
index f3a6373..64a2370 100644
--- a/user_guide_src/source/installation/upgrade_300.rst
+++ b/user_guide_src/source/installation/upgrade_300.rst
@@ -147,6 +147,7 @@
 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