changed include into include_once
diff --git a/system/libraries/Loader.php b/system/libraries/Loader.php
index 576cb11..50bd413 100644
--- a/system/libraries/Loader.php
+++ b/system/libraries/Loader.php
@@ -390,7 +390,7 @@
 			{		

 				if (file_exists(BASEPATH.'helpers/'.$helper.EXT))

 				{

-					include(BASEPATH.'helpers/'.$helper.EXT);

+					include_once(BASEPATH.'helpers/'.$helper.EXT);

 				}

 				else

 				{

@@ -451,13 +451,13 @@
 

 			if (file_exists(APPPATH.'plugins/'.$plugin.EXT))

 			{

-				include(APPPATH.'plugins/'.$plugin.EXT);	

+				include_once(APPPATH.'plugins/'.$plugin.EXT);	

 			}

 			else

 			{

 				if (file_exists(BASEPATH.'plugins/'.$plugin.EXT))

 				{

-					include(BASEPATH.'plugins/'.$plugin.EXT);	

+					include_once(BASEPATH.'plugins/'.$plugin.EXT);	

 				}

 				else

 				{

@@ -524,7 +524,7 @@
 				show_error('Unable to load the requested script: scripts/'.$script.EXT);

 			}

 			

-			include(APPPATH.'scripts/'.$script.EXT);

+			include_once(APPPATH.'scripts/'.$script.EXT);

 		}

 		

 		log_message('debug', 'Scripts loaded: '.implode(', ', $scripts));

@@ -705,7 +705,7 @@
 		}

 		else

 		{

-			include($_ci_path);

+			include_once($_ci_path);

 		}

 		

 		log_message('debug', 'File loaded: '.$_ci_path);

@@ -782,8 +782,8 @@
 					return;

 				}

 	

-				include($baseclass);				

-				include($subclass);

+				include_once($baseclass);				

+				include_once($subclass);

 				$this->_ci_classes[] = $subclass;

 	

 				return $this->_ci_init_class($class, config_item('subclass_prefix'), $params);			

@@ -810,7 +810,7 @@
 					return;

 				}

 				

-				include($filepath);

+				include_once($filepath);

 				$this->_ci_classes[] = $filepath;

 				return $this->_ci_init_class($class, '', $params);

 			}

@@ -844,7 +844,7 @@
 		{

 			if (file_exists(APPPATH.'config/'.$class.EXT))

 			{

-				include(APPPATH.'config/'.$class.EXT);

+				include_once(APPPATH.'config/'.$class.EXT);

 			}

 		}

 		

@@ -886,7 +886,7 @@
 	 */

 	function _ci_autoloader()

 	{	

-		include(APPPATH.'config/autoload'.EXT);

+		include_once(APPPATH.'config/autoload'.EXT);

 		

 		if ( ! isset($autoload))

 		{

diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index b0fa83d..b8bbb33 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -68,7 +68,7 @@
 	<li>Libraries

 		<ul>

 			<li>Added increased security for filename handling in the Upload library.</li>

-			<li>Added increased security for sessions for client-side tampering.</li>

+			<li>Added increased security for sessions for client-side data tampering.</li>

 		</ul>

 	</li>

     <li>Helpers