Does anyone know what the current word is on the CPU fan speed issues?

I'm running a Q9550 (E0 stepping) with B18 BIOS. A cold boot into Linux and the CPU fan speed works like normal for weeks and months at a time (increasing speed with load/heat).

However, if I boot into Windows 7 (64-bit RC) the automatic fan speed will stop working at some point (not always immediately). Sometimes it gets stuck at full speed and other times at low speed. I think it depends on what the computer is doing when the BIOS gets knackered. No amount of rebooting or resetting will fix it, only a cold power-off and cut the power main will fix it. I have tried with and without installing uGuru but that seems to make no difference.

I have seen other posts about this issue but no real solutions. Some people say try changing BIOS rev or whatever but even that seems to have mixed results. Besides, I need to run B18 for my E0 CPU as far as I know.

I'm pretty positive this has something to do with Vista/Win7 because everything works normally in Linux (64-bit) and XP (32-bit). Other people complaining of this issue also seem to be running Vista or Win7. I'm not sure if the 64-bit flavor makes a difference.

If I never had to boot to Windows then I would be OK but as it is it's pretty annoying when I want to play some game that only works in Windows and it ends up screwing up my BIOS. Actually, I think it's a bug in the BIOS but obviously we're not going to get fixes from ABIT. My system runs 24/7 so cold boots put a lot of unnecessary extra stress on my system.