https://bugs.freedesktop.org/show_bug.cgi?id=43096
--- Comment #2 from Tom Stellard tstellar@gmail.com 2011-11-19 20:48:46 PST --- (In reply to comment #1)
Could you try this branch?
git://people.freedesktop.org/~mareko/mesa vbufmgr-fixes
Still they same problem, but now max_index is -2 instead of -1.