Hi, My iMac (G5 iSight) Has started to act very strangely. A few nights ago it started waking up during the night. Yeah that happens, I played about with some prefs and it seemed ok again until last night, when I shut it down. 20 mins or so passed and suddenly it switched on and booted up to the log in screen so I shut it back down. Some more time passed and it did it again. I looked in power saving and it wasn't set to start up or wake up at any time... so I disconnected the router as I thought someone might have some remote access to it. A bit later it started up again. So I unplugged it.... What's going on, any ideas?