So I finally got my E-PM1, at last! (yay!) And I'm totally clueless and don't know what I'm doing, haha.. but I noticed something weird. I hear a prolonged sound of some sort when I take a picture in low lighting. As if something is turning inside. While I wouldn't say it sounds like a grinder of some sort, it does sound kind of similar. Does anyone know if this is normal, or if this is a malfunction? Thanks!