I have a Tivo Series 3 HD with a TWC (New York City) cablecard. Now I find that since their new channel lineup as of a week ago, which clobbered the much-used HD channels, non-premium network channels (now among channels 1-100) that used to have HD counterparts are not appearing in HD as promised. Yes, the image is 16:9 instead of 4:3, but the picture quality is unmistakably SD. Widescreen SD is not the same as HD! And PBS (channel 13) isn't even widescreen -- for PBS I have to adjust the aspect to get a properly proportioned 4:3 image. Has anyone else had this problem? Is there something I should do?