I use Commerce Kickstart ( 2.0-rc4 -> updated to 2.0 ) without the demo shop installed and wanted to enable commerce kickstart menus. However, it didn't work properly so i turned it off and now my toolbar is messed up, the child items are now listed as main items and some of the nodes don't open in an overlay. I don't know if this happened because i enabled commerce kickstart menus and i can't quite remember if the toolbar was already broken before doing so.
I also installed superfish menu (since commerce kickstart theme doesn't support child items in the main menu). Maybe it has something to do with that?
I attached some screenshots of the standard drupal toolbar (#1) and the commerce kickstart menus toolbar enabled (#2).
BTW: This certainly has nothing to do with switching the language to german (was the same with english)