Followed the guide here, and on netkas's site to update to 10.6.2 fine.

Everything works fine, always has.

But i've always had a problem with sleep not being reliable. Sometimes it'll go to sleep fine, then when I wake it (keyboard or power button) it'll all spin up but nothing, blank screen (and dead to any ping/ssh attempts).

Any ideas people?

It's not an easily reproducible error, and nothing seems to get written to the logs. Suggestions as to how I could even track down the issue would be welcome.