Good Morning,the Ubuntu guys apparently noticed a similar bug. But I'm not quite sure if it is actually this bug or only a related one. I also notice crashes with the 7.6-1 packages if composing is enabled on my KDE 4.3.2 desktop, as described in Ubuntu Bug #446578: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/446578 The Ubuntu guys also prepared some patches. It would be great to have them included in the Debian packages, too.
Greetings, Andreas