I've believed for a while that of the two 4:3 setup modes on DVD players (called letterbox vs. P&S), the difference is that the former sends the picture as is (after stretching an anamorphic image, if present), whereas the latter takes a 4:3 piece out of the middle. Today I decided to test this. I used two different DVD players (Samsung M301 and Sony DVP-C600D) and two different discs, one anamorphic and one not. Well, no difference. The Sony manual seems to indicate that the 4:3 P&S setting is effective (i.e., different from 4:3 letterbox) only for certain DVDs. Would these be the ones with the special P&S coding that tells the player where to center the image? If true, then, contrary to what I have been telling a few people, the 4:3 P&S mode is NOT a way to eliminate the black bars for people who don't care about a cropped image. At least not universally so. And, for all I know, the discs for which it is effective are extremely rare, if they even exist. Can anyone in the know help out here?