https://bugs.freedesktop.org/show_bug.cgi?id=28216
--- Comment #2 from Anton Salikhmetov alexo.uniweb@gmail.com 2010-05-23 11:35:55 PDT --- (In reply to comment #1)
Can you please try Mesa 7.8? There are walls of commits from Maciej for the R300c driver and a lot of fixes among them too.
Though Ubuntu Lucid does not yet ship Mesa 7.8, I used the following PPA instead:
https://edge.launchpad.net/~bryceharrington/+archive/bronze
The behavior is the same as for Mesa 7.7.1 which was in use before the upgrade.
Apparently there have been no changes that would affect this error.