https://bugs.freedesktop.org/show_bug.cgi?id=34495
--- Comment #16 from Sergei T kartochka22@yandex.ru 2011-06-27 06:23:44 PDT --- patch fix problem here (Fedora 15, blender/cycles from svn, mesa trunk+patch, x86_64, radeon 5670)
Many thanks, I almost gave up to find solution several last months. (for some reason crash stack was too scrambled with IP looks more like float point number then real address )