This might be related to bug 666501 or bug 810423. The common factor there seems to be compiz. Are you currently using compiz? If so, (and this is a wild guess) does the problem persist if you switch to a different window manager?
** Changed in: ubuntu Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/802844 Title: Xlib doesn't provide current window titles To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/802844/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs