I'm not really sure what to call it, but I just got a new iPhone 3G and when I move the device and look at the screen at the same time, I see faint lines appear all over the screen... almost like interlaced lines or scan lines, but when I stop moving the screen, the lines stop. I checked my iPod touch and my 1st Gen iPhone and neither of them have this issue. Should I take it back? Anyone else see this?