recently, my white Sii been having some "screen wakes up by itself" problem. i didnt touch it, but the screen wakes up by itself, like someone has pushed the home key or power key...(a ghost in the machine?)then goes dark,then alive again..repeats about 3,4,or 5 times then its quiet. latr on it happens again.... it happens quite often now, didnt have this issue when i first got it. is this a bug? any of you having the same issue? is there a fix? something is waking up the phone??! thanks!