depending on the broadcast signal you may see the lines on a analog broadcast (even though direct tv says they are "all digital") You should not see them on an HD broadcast
BTW that is a great tv that you have
ALTHOUGH I TOOK THE HDTV COURSE AT CNET; BY THE WAY IT WAS GREAT, I'M STILL CONFUSED ABOUT HDTV READY OR INTEGRATED. I JUST PURCHASED THE SONY HDTV KD-34XBR960 BUT SOMETIMES I SEE SOME HORIZONTAL LINES IN THE BACKGROUND. MY PROVIDER IS DIRECT TV. HELP PLEASE. THANK YOU.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic