It could be related to https://bugs.launchpad.net/ubuntu/+bug/666501 I can see both titlebar corruption mentioned here and there.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/670430 Title: gtk-window-decorator: VISUAL CORRUPTION of the window titlebar with the default Maverick Ambience theme -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs