Hello guys i have the same issue with sub menu items did you ever resolve your problem ?

I have the same issue - doesn't affect the website when a user is logged in.

Looking in FireBug the error that come up is

[survey] Unable to load prefill data

I'm not sure why this would be happening as there is no survey on any of the pages i'm looking at. The top level menu's still load but the second level menus only work from the home page or any other single level menu page.