I have a Scientific Atlanta 8300HD Hooked up to a 1080p TV. It has been using 1080i Format for more than a year now, and now all the sudden, It wont go above 720p. I can go into the HD setup, run the easy setup mode, and it will say "Congratulations! You are ready to watch TV. All programs will be displayed in the 1080i format." And when I turn the box on it still says "720p" above the time on the front of the box. I have also tried going into advanced setup but 1080i is already selected. So I exit setup and it is still says 720p. I am certain that it actually is 720p and doesn't just say that by mistake because the picture doesn't look any better than our old 720p TV and it used to look a good bit better, and it said "1080i" above the time.