Last night I was using my iPP when I noticed that it was suddenly very sensitive and switching to portrait mode at the lightest touch. This morning it's even worse; it will switch to portrait with almost no provocation one way, but it won't switch to the other portrait orientation (upside down, essentially). Has anyone ever experienced this before? I compared it to my Air 2 to make sure I wasn't being paranoid, but it's definitely an issue. Is there a way to recalibrate the accelerometer, or am I just going to have to exchange it? I don't relish the thought of trying to take care of this on Black Friday.