So I've just re-installed my Vista x64, thought it would be a good time seeing as SP1 is out. I've had an annoying problem ever since I installed Vista in that the computer crashes when waking up from Hibernate and Sleep. It's done this on all the BIOS versions I've tried, I'm on 2602 now. All the fans come on full blast and it just sits there, roaring at me. Not ideal.

This is a completely fresh install, all drivers including my Radeon drivers are the most up-to-date ones.

Any ideas what might be casusing this? My BIOS settings have all the ACPI stuff turned to 'on'.