- Patch #65854 by m3avrck: fixed invalid class names.

includes/menu.inc

@@ -856,7 +856,7 @@ function menu_primary_links($start_level = 1, $pid = 0) {
   if ($pid && is_array($menu['visible'][$pid]) && isset($menu['visible'][$pid]['children'])) {
     $count = 1;
     foreach ($menu['visible'][$pid]['children'] as $cid) {
-      $index = "$start_level-$count-$pid";
+      $index = "menu-$start_level-$count-$pid";
       if (menu_in_active_trail_in_submenu($cid, $pid)) {
         $index .= "-active";
       }