Forgive me if this has already been posted. I just got the DirecTv HD DVR with Tivo and I notice you have to change the format or resoulation on the different channels. It dosn't do it by itself like the regular ones do. I like the native ones where it changes the format by itself from HD to SD. Well anyways how do I know what channel is brodcasting in what format? I want to be ready for when the new fall tv season starts. What if one network is broadcasting in 720ip and the other in 1080i? I don't like changing the format myself. I'm thinking about packing it up and taking it back. Can anyone offer any help before it goes back? Thanks!