I have a similar experience, but on closing a fullscreen app I dont see white, just the desktop background.
I Installed Maverick UNR (on Acer aspire revo), can reproduce by: open firefox, f11 to go full screen (unity bars auto- hide), f4 to close. All see is the background and the mouse cursor, no way to display Unity buttons -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/661801 Title: unity: closing fullscreen apps yields unprettiness -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs