I bought the IR-1050 travel charger from MacMall when I bought my new iPod Touch. When I had it plugged in today I noticed something strange. While the iPod is plugged into the wall the touch screen starts acting funky. When I try flipping through pages on the home screen it sometimes gets caught in the middle and when I tried to power it off I couldn't slide the slider all the way to the right until I unplugged it. None of this happens if I charge off of my macbook. Is this just because it charges faster or should I not be using this? It outputs 5.2V at 700mA, is that in the 'safe' range for charging my iPod?