Despite being marked as 'fix released' three months ago and being of 'low importance', if you do a command line upgrade, you can end up unable to boot into the new kernel.
Fortunately, you're left with the old one(s) and can fix it...
Oh, and the new compiz is a bit buggy, but there's a way to go to the old version.
This entry was originally posted at http://lovingboth.dreamwidth.org/430358.html, because despite having a permanent account, I have had enough of LJ's current owners trying to be evil. Please comment there using OpenID - have and if you have an LJ account, you can use it for your OpenID account. Or just join Dreamwidth! It only took a couple of minutes to copy all my entries here to there.