this appears to be an issue with compiz as the wm. that's the common denominator between the sessions, and explains why classic without effects works.
** Changed in: compiz (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/745399 Title: Gtk.Assistant doesn't render properly _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp