diff --git a/application/controllers/system/Filters.php b/application/controllers/system/Filters.php
index 1b43e82e1..64626f8db 100644
--- a/application/controllers/system/Filters.php
+++ b/application/controllers/system/Filters.php
@@ -21,10 +21,6 @@ class Filters extends FHC_Controller
     {
         parent::__construct();
 
-		// Loads authentication helper
-		// NOTE: needed to load custom filters do not remove!
-		$this->load->helper('fhcauth');
-
 		// Loads the FiltersLib with HTTP GET/POST parameters
 		$this->_loadFiltersLib();
 
diff --git a/application/libraries/CallerLib.php b/application/libraries/CallerLib.php
index 9024c0f09..0b46cf0c6 100644
--- a/application/libraries/CallerLib.php
+++ b/application/libraries/CallerLib.php
@@ -25,16 +25,14 @@ class CallerLib
 		'PersonLogLib'
 	);
 
+	private $_ci; // CI instance
+
 	/**
-	 * Object initialization
+	 * Library initialization
 	 */
 	public function __construct()
 	{
-		// Gets CI instance
-		$this->ci =& get_instance();
-
-		// Loads permission library
-		$this->ci->load->library('PermissionLib');
+		$this->_ci =& get_instance(); // Gets CI instance
 	}
 
 	/**
@@ -80,7 +78,7 @@ class CallerLib
 			elseif (strpos($parameters->resourceName, CallerLib::LIB_PREFIX) !== false)
 			{
 				// Check if the resource is already loaded, it works only with libraries and drivers
-				$isLoaded = $this->ci->load->is_loaded($parameters->resourceName);
+				$isLoaded = $this->_ci->load->is_loaded($parameters->resourceName);
 				// If not loaded then load it
 				if ($isLoaded === false)
 				{
@@ -210,7 +208,7 @@ class CallerLib
 
 		try
 		{
-			$loaded = $this->ci->load->model($resourcePath.$resourceName);
+			$loaded = $this->_ci->load->model($resourcePath.$resourceName);
 		}
 		catch (Exception $e)
 		{
@@ -245,7 +243,7 @@ class CallerLib
 		try
 		{
 			// Gets all the configured resources paths
-			$packagePaths = $this->ci->load->get_package_paths();
+			$packagePaths = $this->_ci->load->get_package_paths();
 			// Looking for a file in every paths with the same name of the resource
 			$found = null;
 			for ($i = 0; $i < count($packagePaths) && is_null($found); $i++)
@@ -262,7 +260,7 @@ class CallerLib
 			if (!is_null($found))
 			{
 				// Load the file
-				$loaded = $this->ci->load->file($found);
+				$loaded = $this->_ci->load->file($found);
 				// If the resource is not present inside the file
 				if (!class_exists($resourceName))
 				{
diff --git a/application/libraries/FiltersLib.php b/application/libraries/FiltersLib.php
index 263956e18..32bb82538 100644
--- a/application/libraries/FiltersLib.php
+++ b/application/libraries/FiltersLib.php
@@ -86,6 +86,9 @@ class FiltersLib
 	{
 		$this->_ci =& get_instance(); // get code igniter instance
 
+		// Loads authentication helper
+		$this->_ci->load->helper('fhcauth'); // NOTE: needed to load custom filters do not remove!
+
 		$this->_filterUniqueId = $this->_getFilterUniqueId($params); // sets the id for the related filter widget
 	}
 
@@ -96,6 +99,7 @@ class FiltersLib
 	 * Checks if at least one of the permissions given as parameter (requiredPermissions) belongs
 	 * to the authenticated user, if confirmed then is allowed to use this FilterWidget.
 	 * If the parameter requiredPermissions is NOT given, then no one is allow to use this FilterWidget
+	 * NOTE: PermissionLib is loaded hedere
 	 */
 	public function isAllowed($requiredPermissions = null)
 	{
diff --git a/application/libraries/PhrasesLib.php b/application/libraries/PhrasesLib.php
index e8582f65b..93250379b 100644
--- a/application/libraries/PhrasesLib.php
+++ b/application/libraries/PhrasesLib.php
@@ -249,6 +249,8 @@ class PhrasesLib
 					$language = $parameters[1];
 				}
 				// Checks if the user is authenticated to retrive the users's language
+				// NOTE: this library could be called when the user is not logged in the system
+				// 		so this is why is checked if the function getAuthUID exists
 				elseif (function_exists('getAuthUID'))
 				{
 					$this->_ci->load->model('person/Person_model', 'PersonModel');