Update about the VT-switching bug: The VT-switching is another bug :) caused by AIGLX. The bug is posted on Freedesktop and there's already a temporary patch available there.
https://bugs.freedesktop.org/show_bug.cgi?id=7916 -- system freeze after clicking task manager trash icon in "pan" newsreader https://launchpad.net/bugs/36596 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
