https://bugs.freedesktop.org/show_bug.cgi?id=37028
--- Comment #21 from Pierre-Eric Pelloux-Prayer pelloux@gmail.com 2011-06-07 14:14:30 PDT --- Could you please update your git repo ?
agd5f pushed a patch (r600g: always clear query memory) which could correct the problem (you still need to apply the first one too)