diff --git a/system/libraries/Cache/Cache.php b/system/libraries/Cache/Cache.php
index f982416..409323d 100644
--- a/system/libraries/Cache/Cache.php
+++ b/system/libraries/Cache/Cache.php
@@ -36,16 +36,38 @@
  */
 class CI_Cache extends CI_Driver_Library {
 
-	protected $valid_drivers 	= array(
-						'cache_apc',
-						'cache_file',
-						'cache_memcached',
-						'cache_dummy',
-						'cache_wincache'
-					);
+	/**
+	 * Valid cache drivers
+	 *
+	 * @var array
+	 */
+	protected $valid_drivers = array(
+		'cache_apc',
+		'cache_file',
+		'cache_memcached',
+		'cache_dummy',
+		'cache_wincache'
+	);
 
-	protected $_cache_path		= NULL;	// Path of cache files (if file-based cache)
-	protected $_adapter		= 'dummy';
+	/**
+	 * Path of cache files (if file-based cache)
+	 *
+	 * @var string
+	 */
+	protected $_cache_path = NULL;
+	
+	/**
+	 * Reference to the driver
+	 *
+	 * @var mixe
+	 */
+	protected $_adapter = 'dummy';
+	
+	/**
+	 * Fallback driver
+	 *
+	 * @param string
+	 */
 	protected $_backup_driver;
 
 	/**
@@ -59,9 +81,9 @@
 	public function __construct($config = array())
 	{
 		$default_config = array(
-				'adapter',
-				'memcached'
-			);
+			'adapter',
+			'memcached'
+		);
 
 		foreach ($default_config as $key)
 		{
diff --git a/system/libraries/Cache/drivers/Cache_apc.php b/system/libraries/Cache/drivers/Cache_apc.php
index 59ab675..c85034f 100644
--- a/system/libraries/Cache/drivers/Cache_apc.php
+++ b/system/libraries/Cache/drivers/Cache_apc.php
@@ -75,7 +75,7 @@
 	 * Delete from Cache
 	 *
 	 * @param	mixed	unique identifier of the item in the cache
-	 * @param	bool	true on success/false on failure
+	 * @return	bool	true on success/false on failure
 	 */
 	public function delete($id)
 	{
diff --git a/system/libraries/Cache/drivers/Cache_dummy.php b/system/libraries/Cache/drivers/Cache_dummy.php
index e8b791c..3f2b4b9 100644
--- a/system/libraries/Cache/drivers/Cache_dummy.php
+++ b/system/libraries/Cache/drivers/Cache_dummy.php
@@ -70,7 +70,7 @@
 	 * Delete from Cache
 	 *
 	 * @param	mixed	unique identifier of the item in the cache
-	 * @param	bool	TRUE, simulating success
+	 * @return	bool	TRUE, simulating success
 	 */
 	public function delete($id)
 	{
diff --git a/system/libraries/Cache/drivers/Cache_file.php b/system/libraries/Cache/drivers/Cache_file.php
index dd27aa9..ec41952 100644
--- a/system/libraries/Cache/drivers/Cache_file.php
+++ b/system/libraries/Cache/drivers/Cache_file.php
@@ -36,8 +36,16 @@
  */
 class CI_Cache_file extends CI_Driver {
 
+	/**
+	 * Directory in which to save cache files
+	 *
+	 * @var string
+	 */
 	protected $_cache_path;
 
+	/**
+	 * Initialize file-based cache
+	 */
 	public function __construct()
 	{
 		$CI =& get_instance();
@@ -86,10 +94,10 @@
 	public function save($id, $data, $ttl = 60)
 	{
 		$contents = array(
-				'time'		=> time(),
-				'ttl'		=> $ttl,
-				'data'		=> $data
-			);
+			'time'		=> time(),
+			'ttl'		=> $ttl,
+			'data'		=> $data
+		);
 
 		if (write_file($this->_cache_path.$id, serialize($contents)))
 		{
diff --git a/system/libraries/Cache/drivers/Cache_memcached.php b/system/libraries/Cache/drivers/Cache_memcached.php
index 4cd5f3d..813df4b 100644
--- a/system/libraries/Cache/drivers/Cache_memcached.php
+++ b/system/libraries/Cache/drivers/Cache_memcached.php
@@ -36,15 +36,25 @@
  */
 class CI_Cache_memcached extends CI_Driver {
 
-	protected $_memcached;	// Holds the memcached object
+	/**
+	 * Holds the memcached object
+	 *
+	 * @var object
+	 */
+	protected $_memcached;
 
+	/**
+	 * Memcached configuration
+	 *
+	 * @var array
+	 */
 	protected $_memcache_conf	= array(
-					'default' => array(
-						'default_host'		=> '127.0.0.1',
-						'default_port'		=> 11211,
-						'default_weight'	=> 1
-					)
-				);
+		'default' => array(
+			'default_host'		=> '127.0.0.1',
+			'default_port'		=> 11211,
+			'default_weight'	=> 1
+		)
+	);
 
 	/**
 	 * Fetch from cache
diff --git a/system/libraries/Cache/drivers/Cache_wincache.php b/system/libraries/Cache/drivers/Cache_wincache.php
index b32e66a..74048d5 100644
--- a/system/libraries/Cache/drivers/Cache_wincache.php
+++ b/system/libraries/Cache/drivers/Cache_wincache.php
@@ -78,7 +78,7 @@
 	 * Delete from Cache
 	 *
 	 * @param	mixed	unique identifier of the item in the cache
-	 * @param	bool	true on success/false on failure
+	 * @return	bool	true on success/false on failure
 	 */
 	public function delete($id)
 	{
diff --git a/system/libraries/Driver.php b/system/libraries/Driver.php
index f409f47..b1fff15 100644
--- a/system/libraries/Driver.php
+++ b/system/libraries/Driver.php
@@ -39,11 +39,27 @@
  */
 class CI_Driver_Library {
 
-	protected $valid_drivers	= array();
+	/**
+	 * Array of drivers that are available to use with the driver class
+	 *
+	 * @var array
+	 */
+	protected $valid_drivers = array();
+	
+	/**
+	 * Name of the current class - usually the driver class
+	 *
+	 * @var string
+	 */
 	protected static $lib_name;
 
-	// The first time a child is used it won't exist, so we instantiate it
-	// subsequents calls will go straight to the proper child.
+	/**
+	 * 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 $child
+	 * @return mixed
+	 */
 	public function __get($child)
 	{
 		if ( ! isset($this->lib_name))
@@ -100,6 +116,8 @@
 
 }
 
+// --------------------------------------------------------------------------
+
 /**
  * CodeIgniter Driver Class
  *
@@ -114,11 +132,32 @@
  */
 class CI_Driver {
 
+	/**
+	 * Instance of the parent class
+	 *
+	 * @var object
+	 */
 	protected $_parent;
 
+	/**
+	 * List of methods in the parent class
+	 *
+	 * @var array
+	 */
 	protected $_methods = array();
+	
+	/**
+	 * List of properties in the parent class
+	 *
+	 * @var array
+	 */
 	protected $_properties = array();
 
+	/**
+	 * Array of methods and properties for the parent class(es)
+	 *
+	 * @var array
+	 */
 	protected static $_reflections = array();
 
 	/**
diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php
index 54b5bf7..17437c1 100644
--- a/system/libraries/Encrypt.php
+++ b/system/libraries/Encrypt.php
@@ -38,12 +38,44 @@
  */
 class CI_Encrypt {
 
+	/**
+	 * Reference to the user's encryption key
+	 *
+	 * @var string
+	 */
 	public $encryption_key		= '';
+	
+	/**
+	 * Type of hash operation
+	 * 
+	 * @var string
+	 */
 	protected $_hash_type		= 'sha1';
+	
+	/**
+	 * Flag for the existance of mcrypt
+	 *
+	 * @var bool
+	 */
 	protected $_mcrypt_exists	= FALSE;
+	
+	/**
+	 * Current cipher to be used with mcrypt
+	 *
+	 * @var string
+	 */
 	protected $_mcrypt_cipher;
+	
+	/**
+	 * Method for encrypting/decrypting data
+	 *
+	 * @var int
+	 */
 	protected $_mcrypt_mode;
 
+	/**
+	 * Initialize Encryption class
+	 */
 	public function __construct()
 	{
 		$this->_mcrypt_exists = function_exists('mcrypt_encrypt');
@@ -349,7 +381,8 @@
 	 *
 	 * Function description
 	 *
-	 * @param	string
+	 * @param	string	$data
+	 * @param	string	$key
 	 * @return	string
 	 */
 	protected function _remove_cipher_noise($data, $key)
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 22bc7dd..a52cad5 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -36,17 +36,81 @@
  */
 class CI_Form_validation {
 
+	/**
+	 * Reference to the CodeIgniter instance
+	 *
+	 * @var object
+	 */
 	protected $CI;
-	protected $_field_data		= array();
-	protected $_config_rules	= array();
+	
+	/**
+	 * Validation data for the current form submission
+	 *
+	 * @var array
+	 */
+	protected $_field_data = array();
+	
+	/**
+	 * Validation rules for the current form
+	 *
+	 * @var array
+	 */
+	protected $_config_rules = array();
+	
+	/**
+	 * Array of validation errors
+	 *
+	 * @var array
+	 */
 	protected $_error_array		= array();
+	
+	/**
+	 * Array of custom error messages
+	 *
+	 * @var array
+	 */
 	protected $_error_messages	= array();
+	
+	/**
+	 * Start tag for error wrapping
+	 *
+	 * @var string
+	 */
 	protected $_error_prefix	= '<p>';
+	
+	/**
+	 * End tag for error wrapping
+	 * 
+	 * @var string
+	 */
 	protected $_error_suffix	= '</p>';
+	
+	/**
+	 * Custom error message
+	 *
+	 * @var string
+	 */
 	protected $error_string		= '';
+	
+	/**
+	 * Whether the form data has been validated as safe
+	 *
+	 * @var bool
+	 */
 	protected $_safe_form_data	= FALSE;
+	
+	/**
+	 * Custom data to validate
+	 *
+	 * @var array
+	 */
 	protected $validation_data	= array();
 
+	/**
+	 * Initialize Form_Validation class
+	 *
+	 * @param array $rules
+	 */
 	public function __construct($rules = array())
 	{
 		$this->CI =& get_instance();
@@ -86,8 +150,9 @@
 	 * This function takes an array of field names and validation
 	 * rules as input, validates the info, and stores it
 	 *
-	 * @param	mixed
-	 * @param	string
+	 * @param	mixed	$field
+	 * @param	string	$label
+	 * @param	mixed	$rules
 	 * @return	object
 	 */
 	public function set_rules($field, $label = '', $rules = '')
@@ -241,6 +306,8 @@
 	 * Gets the error message associated with a particular field
 	 *
 	 * @param	string	the field name
+	 * @param	string	the html start tag
+	 * @param 	strign	the html end tag
 	 * @return	string
 	 */
 	public function error($field = '', $prefix = '', $suffix = '')
@@ -326,6 +393,7 @@
 	 *
 	 * This function does all the work.
 	 *
+	 * @param	string	$group
 	 * @return	bool
 	 */
 	public function run($group = '')
@@ -768,6 +836,7 @@
 	 *
 	 * @param	string
 	 * @param	string
+	 * @param	bool
 	 * @return	string
 	 */
 	public function set_select($field = '', $value = '', $default = FALSE)
@@ -803,6 +872,7 @@
 	 *
 	 * @param	string
 	 * @param	string
+	 * @param	bool
 	 * @return	string
 	 */
 	public function set_radio($field = '', $value = '', $default = FALSE)
@@ -838,6 +908,7 @@
 	 *
 	 * @param	string
 	 * @param	string
+	 * @param	bool
 	 * @return	string
 	 */
 	public function set_checkbox($field = '', $value = '', $default = FALSE)
@@ -1116,6 +1187,7 @@
 	 * Greater than
 	 *
 	 * @param	string
+	 * @param	int
 	 * @return	bool
 	 */
 	public function greater_than($str, $min)
@@ -1129,6 +1201,7 @@
 	 * Equal to or Greater than
 	 *
 	 * @param	string
+	 * @param	int
 	 * @return	bool
 	 */
 	public function greater_than_equal_to($str, $min)
@@ -1142,6 +1215,7 @@
 	 * Less than
 	 *
 	 * @param	string
+	 * @param	int
 	 * @return	bool
 	 */
 	public function less_than($str, $max)
@@ -1155,6 +1229,7 @@
 	 * Equal to or Less than
 	 *
 	 * @param	string
+	 * @param	int
 	 * @return	bool
 	 */
 	public function less_than_equal_to($str, $max)
diff --git a/system/libraries/Profiler.php b/system/libraries/Profiler.php
index 6320ab5..1e86f3c 100644
--- a/system/libraries/Profiler.php
+++ b/system/libraries/Profiler.php
@@ -42,23 +42,45 @@
  */
 class CI_Profiler {
 
+	/**
+	 * List of profiler sections available to show
+	 *
+	 * @var array
+	 */
 	protected $_available_sections = array(
-						'benchmarks',
-						'get',
-						'memory_usage',
-						'post',
-						'uri_string',
-						'controller_info',
-						'queries',
-						'http_headers',
-						'session_data',
-						'config'
-					);
+		'benchmarks',
+		'get',
+		'memory_usage',
+		'post',
+		'uri_string',
+		'controller_info',
+		'queries',
+		'http_headers',
+		'session_data',
+		'config'
+	);
 
+	/**
+	 * Number of queries to show before making the additional queries togglable
+	 *
+	 * @var int
+	 */
 	protected $_query_toggle_count = 25;
 
+	/**
+	 * Reference to the CodeIgniter singleton
+	 *
+	 * @var object
+	 */
 	protected $CI;
 
+	/**
+	 * Constructor
+	 *
+	 * Initialize Profiler
+	 *
+	 * @param array $config
+	 */
 	public function __construct($config = array())
 	{
 		$this->CI =& get_instance();
diff --git a/system/libraries/Typography.php b/system/libraries/Typography.php
index 21bbad0..50bd124 100644
--- a/system/libraries/Typography.php
+++ b/system/libraries/Typography.php
@@ -36,22 +36,46 @@
  */
 class CI_Typography {
 
-	// Block level elements that should not be wrapped inside <p> tags
+	/**
+	 * Block level elements that should not be wrapped inside <p> tags
+	 * 
+	 * @var string
+	 */
 	public $block_elements = 'address|blockquote|div|dl|fieldset|form|h\d|hr|noscript|object|ol|p|pre|script|table|ul';
 
-	// Elements that should not have <p> and <br /> tags within them.
+	/**
+	 * Elements that should not have <p> and <br /> tags within them.
+	 *
+	 * @var string
+	 */
 	public $skip_elements	= 'p|pre|ol|ul|dl|object|table|h\d';
 
-	// Tags we want the parser to completely ignore when splitting the string.
+	/**
+	 * Tags we want the parser to completely ignore when splitting the string.
+	 * 
+	 * @var string
+	 */
 	public $inline_elements = 'a|abbr|acronym|b|bdo|big|br|button|cite|code|del|dfn|em|i|img|ins|input|label|map|kbd|q|samp|select|small|span|strong|sub|sup|textarea|tt|var';
 
-	// array of block level elements that require inner content to be within another block level element
+	/**
+	 * array of block level elements that require inner content to be within another block level element
+	 *
+	 * @var array
+	 */
 	public $inner_block_required = array('blockquote');
 
-	// the last block element parsed
+	/**
+	 * the last block element parsed
+	 *
+	 * @var string
+	 */
 	public $last_block_element = '';
 
-	// whether or not to protect quotes within { curly braces }
+	/**
+	 * whether or not to protect quotes within { curly braces }
+	 *
+	 * @var bool
+	 */
 	public $protect_braced_quotes = FALSE;
 
 	/**
diff --git a/system/libraries/User_agent.php b/system/libraries/User_agent.php
index b8e0d37..0ac605f 100644
--- a/system/libraries/User_agent.php
+++ b/system/libraries/User_agent.php
@@ -38,25 +38,110 @@
  */
 class CI_User_agent {
 
-	public $agent		= NULL;
+	/**
+	 * Current user-agent
+	 *
+	 * @var string
+	 */
+	public $agent = NULL;
 
-	public $is_browser	= FALSE;
-	public $is_robot	= FALSE;
-	public $is_mobile	= FALSE;
+	/**
+	 * Flag for if the user-agent belongs to a browser
+	 *
+	 * @var bool
+	 */
+	public $is_browser = FALSE;
+	
+	/**
+	 * Flag for if the user-agent is a robot
+	 *
+	 * @var bool
+	 */
+	public $is_robot = FALSE;
+	
+	/**
+	 * Flag for if the user-agent is a mobile browser
+	 *
+	 * @var bool
+	 */
+	public $is_mobile = FALSE;
 
-	public $languages	= array();
-	public $charsets	= array();
+	/**
+	 * Languages accepted by the current user agent
+	 *
+	 * @var array
+	 */
+	public $languages = array();
+	
+	/**
+	 * Character sets accepted by the current user agent
+	 *
+	 * @var array
+	 */
+	public $charsets = array();
 
-	public $platforms	= array();
-	public $browsers	= array();
-	public $mobiles		= array();
-	public $robots		= array();
+	/**
+	 * List of platforms to compare against current user agent
+	 *
+	 * @var array
+	 */
+	public $platforms = array();
+	
+	/**
+	 * List of browsers to compare against current user agent
+	 *
+	 * @var array
+	 */
+	public $browsers = array();
+	
+	/**
+	 * List of mobile browsers to compare against current user agent
+	 *
+	 * @var array
+	 */
+	public $mobiles = array();
+	
+	/**
+	 * List of robots to compare against current user agent
+	 *
+	 * @var array
+	 */
+	public $robots = array();
 
-	public $platform	= '';
-	public $browser		= '';
-	public $version		= '';
-	public $mobile		= '';
-	public $robot		= '';
+	/**
+	 * Current user-agent platform
+	 *
+	 * @var string
+	 */
+	public $platform = '';
+	
+	/**
+	 * Current user-agent browser
+	 *
+	 * @var string
+	 */
+	public $browser = '';
+	
+	/**
+	 * Current user-agent version
+	 *
+	 * @var string
+	 */
+	public $version = '';
+	
+	/**
+	 * Current user-agent mobile name
+	 *
+	 * @var string
+	 */
+	public $mobile = '';
+	
+	/**
+	 * Current user-agent robot name
+	 *
+	 * @var string
+	 */
+	public $robot = '';
 
 	/**
 	 * Constructor
@@ -302,6 +387,7 @@
 	/**
 	 * Is Browser
 	 *
+	 * @param	string	$key
 	 * @return	bool
 	 */
 	public function is_browser($key = NULL)
@@ -326,6 +412,7 @@
 	/**
 	 * Is Robot
 	 *
+	 * @param	string	$key
 	 * @return	bool
 	 */
 	public function is_robot($key = NULL)
@@ -350,6 +437,7 @@
 	/**
 	 * Is Mobile
 	 *
+	 * @param	string	$key
 	 * @return	bool
 	 */
 	public function is_mobile($key = NULL)
@@ -503,6 +591,7 @@
 	/**
 	 * Test for a particular language
 	 *
+	 * @param	string	$lang
 	 * @return	bool
 	 */
 	public function accept_lang($lang = 'en')
@@ -515,6 +604,7 @@
 	/**
 	 * Test for a particular character set
 	 *
+	 * @param	string $charset
 	 * @return	bool
 	 */
 	public function accept_charset($charset = 'utf-8')
diff --git a/system/libraries/Xmlrpc.php b/system/libraries/Xmlrpc.php
index fea560c..7009dea 100644
--- a/system/libraries/Xmlrpc.php
+++ b/system/libraries/Xmlrpc.php
@@ -104,24 +104,24 @@
 			);
 
 		// Array of Valid Parents for Various XML-RPC elements
-		$this->valid_parents = array('BOOLEAN'			=> array('VALUE'),
-						'I4'				=> array('VALUE'),
-						'INT'				=> array('VALUE'),
-						'STRING'			=> array('VALUE'),
-						'DOUBLE'			=> array('VALUE'),
-						'DATETIME.ISO8601'	=> array('VALUE'),
-						'BASE64'			=> array('VALUE'),
-						'ARRAY'			=> array('VALUE'),
-						'STRUCT'			=> array('VALUE'),
-						'PARAM'			=> array('PARAMS'),
-						'METHODNAME'		=> array('METHODCALL'),
-						'PARAMS'			=> array('METHODCALL', 'METHODRESPONSE'),
-						'MEMBER'			=> array('STRUCT'),
-						'NAME'				=> array('MEMBER'),
-						'DATA'				=> array('ARRAY'),
-						'FAULT'			=> array('METHODRESPONSE'),
-						'VALUE'			=> array('MEMBER', 'DATA', 'PARAM', 'FAULT')
-					 );
+		$this->valid_parents = array('BOOLEAN' => array('VALUE'),
+			'I4'				=> array('VALUE'),
+			'INT'				=> array('VALUE'),
+			'STRING'			=> array('VALUE'),
+			'DOUBLE'			=> array('VALUE'),
+			'DATETIME.ISO8601'	=> array('VALUE'),
+			'BASE64'			=> array('VALUE'),
+			'ARRAY'			=> array('VALUE'),
+			'STRUCT'			=> array('VALUE'),
+			'PARAM'			=> array('PARAMS'),
+			'METHODNAME'		=> array('METHODCALL'),
+			'PARAMS'			=> array('METHODCALL', 'METHODRESPONSE'),
+			'MEMBER'			=> array('STRUCT'),
+			'NAME'				=> array('MEMBER'),
+			'DATA'				=> array('ARRAY'),
+			'FAULT'			=> array('METHODRESPONSE'),
+			'VALUE'			=> array('MEMBER', 'DATA', 'PARAM', 'FAULT')
+		 );
 
 
 		// XML-RPC Responses
diff --git a/system/libraries/Xmlrpcs.php b/system/libraries/Xmlrpcs.php
index 6d270c2..f0c5b48 100644
--- a/system/libraries/Xmlrpcs.php
+++ b/system/libraries/Xmlrpcs.php
@@ -48,12 +48,39 @@
  */
 class CI_Xmlrpcs extends CI_Xmlrpc
 {
-	public $methods		= array();	//array of methods mapped to function names and signatures
-	public $debug_msg	= '';		// Debug Message
-	public $system_methods	= array();	// XML RPC Server methods
-	public $controller_obj;
-	public $object		= FALSE;
+	/**
+	 * array of methods mapped to function names and signatures
+	 *
+	 * @var array
+	 */
+	public $methods = array();
+	
+	/**
+	 * Debug Message
+	 *
+	 * @var string
+	 */
+	public $debug_msg = '';
+	
+	/**
+	 * XML RPC Server methods
+	 *
+	 * @var array
+	 */
+	public $system_methods	= array();
+	
+	/**
+	 * Configuration object
+	 *
+	 * @var object
+	 */
+	public $object = FALSE;
 
+	/**
+	 * Initialize XMLRPC class
+	 *
+	 * @param array $config
+	 */
 	public function __construct($config = array())
 	{
 		parent::__construct();