My home-built HTPC has a ATI Radeon™ HD 5750 connected to my Panasonic 65VT50 via HDMI. The video resolution is set to 1080p. The problem is the picture doesn't fill the Panasonic's screen completely. The picture is shrunk about two inches all around. The Panasonic picture info confirms that it is getting 1080p. I've checked all the settings and can't find anything wrong. The 5750 has the latest drivers. Any suggestions? Thanks!