virtually all films i have are 2:35:1 ratio which gives you the black Bars at top and bottom. now some times i keep these in as they will contain sub-titles for certain films.if they dont id usually letterbox the picture. now reading about not keeping static images on a plasma do these black bars apply ? if so is it safe to have like a 3 1/2 hr stint at a go i.e lord of the rings Extended edition and if not what to do ? ive read for x amount of hours of static images u need x amount of hours more of motion on the screen. so whats the score with the black bars ?