I am experiencing the same thing. I'm using Compiz Fusion (I believe) and Nvidia proprietary drivers (I don't know the version).
** Attachment added: "Screenshot of corrupted title bar" http://launchpadlibrarian.net/13569411/firefox%20bug.png -- switching firefox tabs sometimes causes firefox to lose focus with compiz https://bugs.launchpad.net/bugs/146459 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
