We recently had our Comcast High Def DVR replaced because the old one took a crap. The new one works fine, except when I want to watch something in Hi Def. The Hi Def channels come across like you're watching tv in a house or mirrors. I see triple and quadruple images spaced equally across the screen. Could this be because the tech who installed the new box made an incorrect adjustment to the settings for HD programming? I use component video cables for HD. Normal programming that comes over RCA video is fine. It's just the HD that is the funhouse mirror effect.