This looks like your using a 4:3 SD TV but have the box set to 16:9 display mode. I don't have the Vz boxes (I use Tivo), but there should be a video settings menu where you can specify that you have a 4:3 SD TV display. I'd start your search there.
Also, make sure you are watching the SD version of the channel (lower numbers) and not the HD version of the channel (usually starting in the 500's).