Sorry if I've missed the discussion here, but I see nothing in a quick search for several keywords and find nothing in the 612 manual about this... I just noticed (is this a new feature?) on my 612 under the top channel/time banner (pops up when you press cancel while watching a show) there are 2 small boxes which say "HD:Normal" and "SD:Normal". Wasn't there only 1 box here before? When you press the "format" button (bottom left on the remote) you get a blurb that says you can press page up or page down to change these zoom modes in these boxes. Is there a description of how/when the difference between these two come into play? I can't see any reference to the items on that top banner in the user guide, and makes me wonder how new firmware features (assuming this is one) are supposed to be learned. I have messed around with them, but I see no difference when watching an SD program channel with the "SD:" set to either "Full Zoom" or "Normal". Does anyone know how to use these?