Index: wp-admin/nav-menus.php
===================================================================
--- wp-admin/nav-menus.php	(revision 23225)
+++ wp-admin/nav-menus.php	(working copy)
@@ -322,7 +322,7 @@
 					foreach( (array) $_POST['menu-item-db-id'] as $_key => $k ) {
 
 						// Menu item title can't be blank
-						if ( empty( $_POST['menu-item-title'][$_key] ) )
+						if ( ! isset( $_POST['menu-item-title'][$_key] ) )
 							continue;
 
 						$args = array();