diff --git a/application/config/user_agents.php b/application/config/user_agents.php
index bb13516..5887a15 100644
--- a/application/config/user_agents.php
+++ b/application/config/user_agents.php
@@ -222,4 +222,4 @@
 );
 
 /* End of file user_agents.php */
-/* Location: ./application/config/user_agents.php */
+/* Location: ./application/config/user_agents.php */
\ No newline at end of file
diff --git a/system/core/Common.php b/system/core/Common.php
index cf9cd84..7f296b1 100644
--- a/system/core/Common.php
+++ b/system/core/Common.php
@@ -224,7 +224,7 @@
 	 * @param	array
 	 * @return	array
 	 */
-	function &get_config(array $replace = array())
+	function &get_config(Array $replace = array())
 	{
 		static $_config;
 
@@ -436,7 +436,7 @@
 	{
 		static $_log;
 
-		if (empty($_log))
+		if ($_log === NULL)
 		{
 			// references cannot be directly assigned to static variables, so we use an array
 			$_log[0] =& load_class('Log', 'core');