https://bugs.freedesktop.org/show_bug.cgi?id=28630
--- Comment #9 from Marek Olšák maraeo@gmail.com 2010-06-29 15:27:09 PDT --- OK so I've committed some fixes because they don't break anything. Please let me know if they help.
PS: There is a new bug in the GLSL compiler in master. I hope you won't hit that.