I have strictly SD service, nothing HD in the house. I'm in the Abilene/Sweetwater DMA. Since our Fox affiliate, KXVA, went digital at the changeover deadline I've been watching widescreen programs OTA, letterboxed, through a converter, and switching to Dish for the 4:3 programs to get a fullscreen picture. The Sunday cartoons are not all widescreen yet. Last week I noticed the widescreen programs were letterboxed on Dish and the 4:3 programs were still fullscreen. Friday at the beginning of the football game an announcer was saying "the black bars are normal" when I tuned in, so I think Fox has changed a feed or a flag or something. What has changed?