Index: wp-includes/plugin.php
===================================================================
--- wp-includes/plugin.php	(revision 14690)
+++ wp-includes/plugin.php	(working copy)
@@ -743,13 +743,13 @@
 	} else {
 		$function = (array) $function;
 	}
-	
+
 	if (is_object($function[0]) ) {
 		// Object Class Calling
 		if ( function_exists('spl_object_hash') ) {
-			return spl_object_hash($function[0]) . $function[1];
+			return spl_object_hash($function[0]) . @$function[1];
 		} else {
-			$obj_idx = get_class($function[0]).$function[1];
+			$obj_idx = get_class($function[0]) . @$function[1];
 			if ( !isset($function[0]->wp_filter_id) ) {
 				if ( false === $priority )
 					return false;