Marking as fixed since it works now. Feel free to reopen if you get the issue again
** Changed in: gnome-panel (Ubuntu) Status: Needs Info => Fix Released -- Gnome window list causes gnome-panel to eat all CPU https://launchpad.net/bugs/56289 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs