When in coherence mode, I am often confronted with blank menus (typically right-click menus). Moving the mouse causes them to draw. Anyone else?
I've not noticed this with Windows 7, but under Fedora I have on occasion gotten something very similar by clicking on the Application menu/button thing at the top left. If it does not display the content clicking it again usually works, or if I just mouse over where text should be it fills in the text.