Index: trunk/core/kernel/event_manager.php
===================================================================
diff -u -N -r5219 -r5423
--- trunk/core/kernel/event_manager.php	(.../event_manager.php)	(revision 5219)
+++ trunk/core/kernel/event_manager.php	(.../event_manager.php)	(revision 5423)
@@ -336,7 +336,7 @@
 
 		function registerHook($hookto_prefix, $hookto_special, $hookto_event, $mode, $do_prefix, $do_special, $do_event, $conditional)
 		{
-			if( !$this->Application->getUnitOptions($hookto_prefix) )
+			if( !$this->Application->prefixRegistred($hookto_prefix) )
 			{
 				if($this->Application->isDebugMode())
 				{