The problem is still present after a complete reinstall of Ubuntu Quantal, see attached screenshot.
** Attachment added: "Corrupted tranbsparency on Thinkpad T61" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1090732/+attachment/3464913/+files/Screenshot%20from%202012-12-20%2021%3A26%3A51.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1090732 Title: corrupted transparency with nouveau driver on Thinkpad T61 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1090732/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs