Just replaced the my HDTivo with a HR20-700. Pretty pleased with it so far but have a question. In the guide I'll see something like this for DFW local channel 5: 5 KXAS 5 DL5 5-1 KXAS-DT 5-2 DXAS... From what the installer said, the first option "5 KXAS" will automatically display the HD signal if the show is in HD, otherwise it shows the SD signal. So, choosing this one channel displays the best signal available and I don't have to manually determine whether it's HD or SD and choose "5 DL5" or "5-1 KXAS-DT" to get the right signal. Sounds like a good idea but it doesn't seem to work. It appears to always display the HD signal. When an HD program is on it looks fine, in HD. When an SD program is on it appears with pillars. Pressing the format button does nothing .. ie: can't cycle between crop, pillars, stretch. I'm thinking our local channels might always be transmitting an HD signal, even when SD shows are on .. ie: it simply transmits SD with pillars as the HD signal. If this is the case I wonder if that's confusing the HR20, making it think it's always HD. Anyway, I'm just wondering if this auto-select functionality works for anyone? As crappy as stretched SD TV looks on my 65' TV, I rarely watch with the pillars.