My less-than-a-day-old new iPhone 3G 16GB has reset itself (showed the Apple logo and all) twice now. It did it both times after I closed an App (AIM in one case, Aurora Feint in the other) and went into the Settings menu. The screen didn't load, and after about 5 seconds, boom! Reset. Is this just the apps causing issues? A bit annoying, let me tell you!