Is it normal for there to be a very faint, quick-in-succession, clicking noise when I do the trackpad scrolling? It kind of sounds like very faint crickets everytime I scroll. Of course, I only hear it when I'm reading late at night, but it's just...odd. And what kind of battery charge capacity should I be expecting? After having had it for nearly two months now and having done the battery calibration numerous times, I'm still at 3800mAh. Does that sound low and something I can call up AppleCare with and request for a new battery?