I have a 1.8 single G5. I installed the 10.3.5 update and after that, the computer wouldn't sleep. The screen would go black, but the fan would still be turning and it would not "snore". So I call Apple and they tell me to reinstall 10.3. So I do and the thing sleeps fine. Thinking something was wrong with the way I download the update, I re-update to 10.3.5. Same problem as before. Has anybody heard of this before? I thought I saw a thread on this earlier, but I can't find it anywhere if I did. Does anybody have any ideas? Any advice would be greatly appreciated!!