DP2 Menu bar in fullscreen doesn't popup...?

When I put Preview, Safari, Mail, and every app I've tried thus far into full screen the menu bar is not visible when I move the mouse in that area. If I click where the bar ought to be, the menu items show, but the bar still remains invisible. (See screenshot where I clicked on the invisible menu bar.)

It was working perfectly in DP1, has anyone else had this problem?

 

I found two other incongruities, and I ended up trying something I haven't needed to do for a long time... I restarted. Working now! All bugs have been fixed for me;