Fixed a bug where CI_Model is always loaded in core/Loader.php, regardless of if the class is instantiated or not.
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 292fdc9..3169856 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -177,7 +177,7 @@
 				$CI->load->database($db_conn, FALSE, TRUE);
 			}
 
-			if ( ! class_exists('Model'))
+			if ( ! class_exists('CI_Model'))
 			{
 				load_class('Model', 'core');
 			}