Hi, I got offered a 12" powerbook, 1.33Ghz, 768MB Ram for a very reasonable price ($400). The laptop does however show some signs of usage.. Next to a little 'crack' in the case and some minor scratches is a spot that looks a bit wierd. As if the paint was 'melted' away... could there be a heat problem? Or is there something else that caused this? I attached a photo.