Index: trunk/core/units/users/users_event_handler.php
===================================================================
diff -u -N -r4625 -r4651
--- trunk/core/units/users/users_event_handler.php	(.../users_event_handler.php)	(revision 4625)
+++ trunk/core/units/users/users_event_handler.php	(.../users_event_handler.php)	(revision 4651)
@@ -14,6 +14,11 @@
 				return true;
 			}
 			
+			if ($event->Name == 'OnSetPersistantVariable') {
+				// only logged in users have persistant variables
+				return $this->Application->GetVar('u_id') > 0;
+			}
+			
 			return parent::CheckPermission($event);
 		}