I think Alistair is correct: I have no Black rectangle issue (not using nvidia), but "always on top" is certainly broken in the way the OP described.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1174054 Title: "Always on top" breaks spread/expose To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1174054/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs