Sorry to burden you with yet another "issue" with my new Panny TX28DTX10 100 Hz IDTV but, as a newbie to widescreen TVs, I am uncertain of what it normal and what isn't. I'd really appreciate your advice on the following: Over the last few days, I've noticed that there is a triangular area on both sides of the screen (about half way down) in which fine, closely spaced diagonal lines can sometimes be seen (usually when the image is dark). The bases of the triangles run along the sides of the screen. At first, I thought it was just the "grain" of the screen construction I was seeing, but, of course, that runs vertically and not diagonally. Any ideas what this might be and whether it is fixable? Thanks as ever for your help.