We started to receive a bunch of bug reports (crashes, performance issues, repaint issues) around the combination of KWin, Kubuntu 12.10, Mesa 9 and Intel drivers. Seems like mostly IvyBridge is affected.

I'm very concerned about that, especially that it appears just a few days before the release.

I just wish for once a smooth release and no surprises days before final release. Maybe next time do not integrate the latest Mesa version a week before the release - Mesa 8 is working just fine? Having time to actually do tests and being able to do fine tuning in KWin would be awesome. Of course that's not Kubuntu's fault given that the base system is done by Ubuntu.