Mine does not work quite as expected with certain OTA channels in the Dallas area. With SD programming on these channels (with S-video out) I get the side bars applied by my widescreen TV (expected), but then within my 4:3 picture the 811 puts black bars on the top, bottom, and both sides. So I end up with a very small picture. But if a station is multicasting, it seems like it doesn't do it on the second channel (ie. 5.1 has this problem but 5.2 does not). I think it must have something to do with the broadcast by the station though, rather than the 811 itself. All the Dish SD channels are formatted correctly.