Well, the bug happened again in the same way and now can be said that buttons can be used normally; but the first one disappeared after some time.
** Attachment added: "Corruption 2.png.tar.gz" http://launchpadlibrarian.net/45587090/Corruption%202.png.tar.gz -- Bad graphics in the fast user switch screen https://bugs.launchpad.net/bugs/569780 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-panel in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs