I have a new in june 2006 white macbook 2.0GHz Intel Core 2 Duo w/ 1gig ram. Since new the mac book occasionally restarts? or goes into sleep mode and drains battery AFTER the macbook has been properly shut down (not logged out or lid closed for sleep.) I will find the macbook w/battery totally drained or when I start it up it says that the OS was improperly shut down. It starts up just fine. I found it in my case heated up and in sleep mode yesterday after once again, properly shutting it down. any clues would be greatly appreciated. thanks