I thought I noticed a bit of smearing (especially visible in faces). Turned off noise reduction, which I had set to low, and the smearing disappeared.
I think it's the lousy broadcasts. Some SD channels can be decent, others are lousy. HD channels also vary. Sometimes HBO, Showtime, etc. are excellent, other times just ok (but still much better than SD).
One HD channel that's lousy here is CBS. Lots of artifacting.
Both ESPN's are always excellent.
HD-DVD's and SD-DVD's are terrific, depending on the quality of the disc (XA-2).