After installing and booting the new kernel kernel-184.108.40.206-1.fc15.i686 the volume control and the switch disaperd from alsamixer and there is no sound in analog cd playpack (and in my case from a saa7134 bases TV card). When booting with the old kerne-220.127.116.11-3.fc15.i686 everything is ok. I don'l know about the intermediate kernel-18.104.22.168-2.fc15.i686
Same problem with kernel-3.2.5-3.fc16.x86_64 and after on the same machine, but if I remamber correctly things worked after install.
Attached is the output of alsa-info in the two cases.