Audio stopped working?

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http://forums.fedoraforum.org – Yesterday all was good and fine with no issues whatsoever. Today, when I start up I have audio at the login screen - the characteristic "clunk" when I choose my user account. Once KDE starts up I see that my audio is muted. Hovering over it says "Volume at 100% (muted)" - no problem, I'll just unmute it. But I get no audio on YouTube or RhythmBox or any other method I've tried audio. This happened once before with FC9 or FC10 - a kernel update killed the audio. I did a full update last night but didn't notice any issues until this morning after reboot. Booting into the old kernel didn't seem to fix the problem though. Any tips on getting my audio back? -Kirk BTW - I'm running FC12 with KDE 4.3.4 (HowTos)