- Patch #10869 by JonBob: the menu.module forget the parent item on form error.

modules/menu.module

@@ -225,7 +225,8 @@ function menu_edit_item($mid = 0) {
         menu_edit_item_save($edit);
         drupal_goto('admin/menu');
       }
-      // Fall through.
+      $output .= menu_edit_item_form($edit);
+      break;
     default:
       if ($mid > 0) {
         $item = db_fetch_object(db_query('SELECT * FROM {menu} WHERE mid = %d', $mid));

modules/menu/menu.module

@@ -225,7 +225,8 @@ function menu_edit_item($mid = 0) {
         menu_edit_item_save($edit);
         drupal_goto('admin/menu');
       }
-      // Fall through.
+      $output .= menu_edit_item_form($edit);
+      break;
     default:
       if ($mid > 0) {
         $item = db_fetch_object(db_query('SELECT * FROM {menu} WHERE mid = %d', $mid));