(In reply to comment #8)
> This is most likely a mesa issue; there are several new features in mesa
> that are only enabled with a 3.8 kernel.  Can one of you use git to bisect
> mesa to see what commit broke things?  bisecting is a feature of git that
> allows you to easily narrow down what commit to a project caused the
> breakage.  You might also try mesa from the 9.1 branch.  Also, if you are
> using the llvm backend in the r600 driver, you might try disabling that.

I'm sorry, but I don't know how to.