I'll have to check other forums but my multimedia volume keys no longer function properly. I launched iTunes and expected the usual volume slider to move using the command-arrow (up/down) keys. Well that still works. But I get the same result using my volume keys found on the Pro KB. Under 9.1.x I'd get a small window at the bottom of the screen indicating the volume level. Outside of iTunes I get the little window. Did I find a bug?