Anyone else notice this: I've never changed the energy settings on my iMac and never has this problem before updating to 10.5.3. I've noticed now that if the imac and ATV are streaming a film for example the iMac will go to sleep at the time specified in the Energy settings. This never happened before as the iMac would class, that if its streaming to the ATV then it was doing something, so it wouldn't kill the stream. I know I can set it to not go to sleep, its just odd that its started happening..? Any ideas.