here are two different kind of issue:
1. one have problems that their moduls are not being loaded.
2. others have their moduls laoded correctly but the opengl feautres are not what we expected to be in mesa 10
the latter one is what me and others observed and as far as i saw this is the most often case here, snice oibaf updated to mesa 10.
ps. hardware accel works fine so far btw.