Not wanting to stray to far from the main subject of this thread but why are you getting black bars on the sides of nonanamorphic discs? I don't know what TV and player you're using but if the player is set to output to a widescreen TV then even they should fill your screen's width but the height would be distorted and the black bars top and bottom would be larger than thet should be.

Actually that how is used to be under my old player, which was a Toshiba 2109. But since I got my Panny RP-91, it comes across that way. Of course all I have to do is change the settings on my TV from full to a different picture size to enlarge the picture.

But under my current settings, all anamorphic DVDs look as they should and all 4:3 stuff comes out 4:3 with black bars only on the sides. I'm not too technical, but the player is basically reading the non-anamophic DVDs as 4:3 except the bars are encoded in (as per non-anamorphic).

Gotcha.