When I go into the camera app to take a pic there is a little black mark. I have the stock camera app plus camera 360 and the mark shows up in both apps. It is there when looking thru the viewfinder and also shows up on the picture. I have only had this NS4G for a month and I've never dropped it or anything. The last pic I took before today was on the 17th and the mark isn't there. Today it is and there is no scratches or anything for that matter on the lens or the glass cover over it. Can anyone help me fix this?? This is my first post I'll add a pic to illustrate when it will let me