Ok on my Panasonic Pt53wx53 RPTV, I have noticed that some DVDs will have a thicker black bar on the top sometimes and other times the black bar will be thicker on the bottom. And then there are times when a movie will be dead center from top to bottom. This varries between movie titles and can be repeated with the same DVD title, but another physical DVD. So it seems that this is specific to a movie title and not a physical disk. I posted this in the DVD forum, because I think this is an aspect of the DVD and not my TV. My question is, what causes this to happen with different DVD titles.