Grady,
How is your system hooked up? Are you watching non-HD cable through the component video input on your set? Did you calibrate the DVD Player through the component input at well (doesn't have to be the same input).
On the Toshiba sets there are separate offsets in the service/designer menu for component 480i, component 480p, 1080i, S-video, ect. The settings you may have setup for your DVD Player may not directly correspond to what you should be using for cable. If your DVD Player was in the Progressive mode I would go back and try setting up the input for your cable box.
Good Luck,
