I have an problem with the menu at the homepage were I also used a slider. The menu / navigation is not activated on the homepage, but on all other sites.
@ichraum If you have not done any change to the code or styling then this should not appear. This might be a plugin conflict, so try deactivating you active plugins one by one and see if this solves the issue.
@ten12design We have replied your same query in email and think it is solved now.