E* Discovery HD jittery

I have seen this in the past. It seemed that it was only on certain programs and not others.
 
It's happening on all programming on Discovery HD. My tv supports both and it is set on 1080i. I never had this problem before. It showed up after the upgrade to the HD package from just having Discovery HD. The others... HDNET etc are all fine.
 
Yeah, i think it is the discovery broadcast itself. Time Warner Cable HD had the same issues with discovery hd theater also.