Does anyone else with TWC have issues with TNT HD? Whenever I go to TNT HD (channel 1301 on TWC Triad/Burlington, NC), it shows up on the screen with proper resolution/aspect ratio on the TV for 1 or 2 seconds, then the screen flashes off, and comes back and for another 1 to 2 seconds, it's still proper, then it automatically stretch-o-visions itself to the point where the TNT HD logo is half-chopped off. IT LOOKS TERRIBLE!! This happens on the HDMI output only (if I use the yellow RCA connection, this not happen... of course then it's not really HD). What am I (or, more likely, is TWC) doing wrong? This also happens with Hallmark HD, but no other channels. The SD feeds of these channels are fine. Thanks.