No sound with FC3 and Intel I82801

[bbales]

Sound worked on my FC3 box using XMMS and mplayer until I ran up2date.  Now 
XMMS and mplayer both are working, but there is no sound.  When I boot 
from the older 2.6.9 kernel, sound works like it should.

If I load the knoppix disk, I have sound.  The motherboard has an Intel 
I82801DB sound chip.

How does one go about troubleshooting such a problem?

Would it be wise (or even possible) to back out the changes?

Thanks in advance for any help,
bruce