Does this also happen, after you restart compiz ('compiz --replace' from a terminal)? If not, then it's probably bug 690461.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/696421 Title: Unity visual glitches (nvidia-current) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs