A few of the DVDs that I have bought have this problem where every time the film changes from frame to frame, it has a flicker at the bottom of the picture. It is very annoying, and recently, more DVDs that I get are having the problem. Has anyone else encountered this? Is there anyway to get rid of it without getting rid of the DVD? This is very distracting when I'm trying to watch a film, and I'm getting tired of it.