[CentOS] Volume keys don't work

Sat Apr 17 01:36:40 UTC 2010
MHR <mhullrich at gmail.com>

A side effect that I just noticed is that the volume up/down controls
keys no longer seem to function at all.

I reset the keyboard shortcuts to use them, but even with the whole
volume control panel enabled, they don't do a thing.

What did I break?  I don't remember seeing this one before....