This is maybe related to the proprietary nvidia graphics drivers. Bug #370100 has the same ugly black bar (http://launchpadlibrarian.net/26193604/workrave-problem.png).
-- (jaunty) XFCE Panel randomly generates artifacts in system tray https://bugs.launchpad.net/bugs/350675 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
