Yea, my grandma has the same problem... Hehe, just kidding. Nope, I don't have this problem but then again, I'm on a intel mac. With my Powerbook G4 though, it doesn't do this. Did you archive and install or erase the whole thing? Does this happen continuously? Are you able to start it up?
upgrade, i guess this happens every time it goes to sleep. its my dads iMac. you have to hold the power button to turn it off, it boots up fine.