Comment 6 for bug 917266

I wouldn't have expected that your Ironlake graphics would have been blocklisted/blacklisted on Oneiric which has mesa 7.11-0ubuntu3.2, given that according to the page you linked Firefox only needs mesa 7.10.3, but good news in the end, I guess.

If you do begin to see graphical glitches you should be able to disable the layers acceleration and keep using the WebGL force-enabled.