When to update your BIOS

For about a week I've been trying to correct a problem with my desktop PC. I had updated it to Ubuntu's Hardy Heron, and suddenly I couldn't reach the network anymore. Hmmm. That was surprising. So I spent a week chasing down all the possible reasons. I decided it was the driver for my nforce chipset. The version changed in the new kernel, and when I booted to the old kernel everything worked fine. So I'm researching how to downgrade driver versions and trying to get the kernel source, etc, etc. Finally, on a whim, I check to see if there's a new BIOS for my motherboard. And there is! And it fixes the problem! I feel pretty stupid.
I overclock to get a few more frames for my games, and any BIOS change can mess up a good overclock. So I never update unless there's a problem. I just wish I would remember to try that sooner.
Moral of the story - any time you have a weird driver or hardware problem, check your BIOS revision right away.