Could the wrong cable have an effect? I just got one off E-bay, it is a double, and when I plugged it in, the picture was horrible and aspect ratio ws like on a full zoom or more. Could only see about 1/3 of the picture. Could this be related to the aspect raio problems of the 811. Hooked up thru RGB I get a good HD picture & was hoping it might be better with the dvi.
Check the Picture settings of your TV, most I have seen have a "one to One" pixel setting and a "Fill Screen" settting for the DVI input setting.
If yours is set to "one to one" and you use 1080i with a TV that only has 720 native pixels you would experience the problem you describe.
Dave