Sadly the problem is still there. Rebooted the system without starting Skype, and as soon as i launched Firefox the invisible window was back.
** Attachment added: "xwininfo output" https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/709461/+attachment/2130626/+files/xwininfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/709461 Title: Application windows can sometimes fail to display and will mask regions of the screen -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
