diff --git a/application/config/config.php b/application/config/config.php
index 6f597b1..0608348 100644
--- a/application/config/config.php
+++ b/application/config/config.php
@@ -229,8 +229,11 @@
 | Log File Extension
 |--------------------------------------------------------------------------
 |
-| Leave this BLANK unless you would like to set something other than the default
-| 'php'. For example you could change it to 'log'.
+| The default filename extension for log files. The default 'php' allows for
+| protecting the log files via basic scripting, when they are to be stored
+| under a publicly accessible directory.
+|
+| Note: Leaving it blank will default to 'php'.
 |
 */
 $config['log_file_extension'] = '';
diff --git a/system/core/Common.php b/system/core/Common.php
index 136dd52..f8c1290 100644
--- a/system/core/Common.php
+++ b/system/core/Common.php
@@ -414,7 +414,7 @@
 	function log_message($level = 'error', $message, $php_error = FALSE)
 	{
 		static $_log, $_log_threshold;
-		
+
 		if ($_log_threshold === NULL)
 		{
 			$_log_threshold = config_item('log_threshold');
@@ -429,7 +429,7 @@
 		{
 			$_log =& load_class('Log', 'core');
 		}
-		
+
 		$_log->write_log($level, $message, $php_error);
 	}
 }
@@ -713,4 +713,4 @@
 }
 
 /* End of file Common.php */
-/* Location: ./system/core/Common.php */
+/* Location: ./system/core/Common.php */
\ No newline at end of file
diff --git a/system/core/Log.php b/system/core/Log.php
index 0749de8..a84d3dc 100644
--- a/system/core/Log.php
+++ b/system/core/Log.php
@@ -73,6 +73,13 @@
 	protected $_date_fmt		= 'Y-m-d H:i:s';
 
 	/**
+	 * Filename extension
+	 *
+	 * @var	string
+	 */
+	protected $_file_ext;
+
+	/**
 	 * Whether or not the logger can write to the log files
 	 *
 	 * @var bool
@@ -86,8 +93,10 @@
 	 */
 	protected $_levels		= array('ERROR' => 1, 'DEBUG' => 2, 'INFO' => 3, 'ALL' => 4);
 
+	// --------------------------------------------------------------------
+
 	/**
-	 * Initialize Logging class
+	 * Class constructor
 	 *
 	 * @return	void
 	 */
@@ -96,8 +105,8 @@
 		$config =& get_config();
 
 		$this->_log_path = ($config['log_path'] !== '') ? $config['log_path'] : APPPATH.'logs/';
-
-		$this->_log_ext = ($config['log_file_extension'] !== '') ? ltrim($config['log_file_extension'], '.') : $this->_log_ext;
+		$this->_file_ext = (isset($config['log_file_extension']) && $config['log_file_extension'] !== '')
+			? ltrim($config['log_file_extension'], '.') : 'php';
 
 		file_exists($this->_log_path) OR mkdir($this->_log_path, DIR_WRITE_MODE, TRUE);
 
@@ -149,15 +158,16 @@
 			return FALSE;
 		}
 
-		$filepath = $this->_log_path.'log-'.date('Y-m-d').'.php';
-		$message  = '';
+		$filepath = $this->_log_path.'log-'.date('Y-m-d').'.'.$this->_file_ext;
+		$message = '';
 
 		if ( ! file_exists($filepath))
 		{
 			$newfile = TRUE;
-			if($this->_log_ext === 'php')
+			// Only add protection to php files
+			if ($this->_file_ext === 'php')
 			{
-				$message .= '<'."?php defined('BASEPATH') OR exit('No direct script access allowed'); ?".">\n\n";
+				$message .= "<?php defined('BASEPATH') OR exit('No direct script access allowed'); ?>\n\n";
 			}
 		}
 
diff --git a/system/libraries/Profiler.php b/system/libraries/Profiler.php
index 36e0431..470688f 100644
--- a/system/libraries/Profiler.php
+++ b/system/libraries/Profiler.php
@@ -238,7 +238,6 @@
 		foreach ($dbs as $name => $db)
 		{
 			$hide_queries = (count($db->queries) > $this->_query_toggle_count) ? ' display:none' : '';
-
 			$total_time = number_format(array_sum($db->query_times), 4).' '.$this->CI->lang->line('profiler_seconds');
 
 			$show_hide_js = '(<span style="cursor: pointer;" onclick="var s=document.getElementById(\'ci_profiler_queries_db_'.$count.'\').style;s.display=s.display==\'none\'?\'\':\'none\';this.innerHTML=this.innerHTML==\''.$this->CI->lang->line('profiler_section_hide').'\'?\''.$this->CI->lang->line('profiler_section_show').'\':\''.$this->CI->lang->line('profiler_section_hide').'\';">'.$this->CI->lang->line('profiler_section_hide').'</span>)';
@@ -252,7 +251,7 @@
 				."\n"
 				.'<legend style="color:#0000FF;">&nbsp;&nbsp;'.$this->CI->lang->line('profiler_database')
 				.':&nbsp; '.$db->database.' ('.$name.')&nbsp;&nbsp;&nbsp;'.$this->CI->lang->line('profiler_queries')
-				.': '.count($db->queries).'('.$total_time.')'.'&nbsp;&nbsp;'.$show_hide_js."</legend>\n\n\n"
+				.': '.count($db->queries).' ('.$total_time.')&nbsp;&nbsp;'.$show_hide_js."</legend>\n\n\n"
 				.'<table style="width:100%;'.$hide_queries.'" id="ci_profiler_queries_db_'.$count."\">\n";
 
 			if (count($db->queries) === 0)
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 140fda8..8d3f370 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -55,7 +55,7 @@
    -  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>`.
    -  Removed *cheatsheets* and *quick_reference* PDFs from the documentation.
    -  Added availability checks where usage of dangerous functions like ``eval()`` and ``exec()`` is required.
-   -  Added support for changing the file extension of CodeIgniter log files using $config['log_file_extension'].
+   -  Added support for changing the file extension of log files using ``$config['log_file_extension']``.
 
 -  Helpers
 
@@ -273,8 +273,8 @@
 	 -  Added support for hashing algorithms other than SHA1 and MD5.
 	 -  Removed previously deprecated ``sha1()`` method.
    -  :doc:`Profiler Library <general/profiling>` changes include:
-	 -  Database object names displayed.
-	 -  The sum of all queries running times in seconds displayed.
+	 -  Database object names are now being displayed.
+	 -  The sum of all queries running times in seconds is now being displayed.
    -  :doc:`Migration Library <libraries/migration>` changes include:
 	 -  Added support for timestamp-based migrations (enabled by default).
 	 -  Added ``$config['migration_type']`` to allow switching between *sequential* and *timestamp* migrations.