Hello,
If I right-click an item on the start8 menu and select Run As Administrator, Start8 shows itself above the UAC dialog, previous versions did not have this issue.
I have UAC configured as follows: http://i.imgur.com/2uBvh.png, After right-clicking any item and selecting Run As Admin, this is what happens with the UAC dialog behind the Start8 menu: http://i.imgur.com/nRSaK.jpg
It's a really annoying bug 
-dmex