Those two screenshotss show a flickering, that very often appears on windows. On 12.04.1 you would instead see a pulsating window while the process seems to not respond for a moment. On 12.10 you get instead a flickering transparent frame around the window, that also seems to remove a part of the panel.
** Attachment added: "Bildschirmfoto vom 2012-09-16 00:19:01.png" https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1047306/+attachment/3317589/+files/Bildschirmfoto%20vom%202012-09-16%2000%3A19%3A01.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1047306 Title: [Mesa reverted, not impacting quantal right now] [Quantal] [Intel Atom] Mesa 2012/09/07 updates broke it all To manage notifications about this bug go to: https://bugs.launchpad.net/mesa/+bug/1047306/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs