How are you getting the HD, via Dish or OTA? and, do you mean 'pixilated', kind of blocky in spots while part of image seems ok? Scramble looks more like some went nuts with horizontal and vertical controls. Pixilation may be caused with low signal strength.
LOST has been pixilated for me also for the last two weeks. I just added HD locals from Richmond. I was barely able to get a signal through some trees. I have not had this problem on any other show, but I do not watch the network shows very often and few on ABC. I was ready to have someone come trim the tree, but I guess I will wait to see if anyone else is having this problem.
I have that problem as well on the Palm Beach ABC Hi-Def from dish. My OTA ABC has always been bad so I was hoping the one from dish would have been an improvement but it seems to be about as bad as the OTA.
All depending on where you live Dish recieves HD loacals via OTA or fiber from the station then fiber to uplink then UP then back down the end user...so the problem could be anywhere along the way. Did you have the same issue OTA?
I'm receiving the Seattle HD locals (too bad we don't get the local Fox HD so I could compare ). I had the same problem the OP described last week, and last night again. Both Greys Anatomy and Lost. The problem either ends up with a full screen of garbage, or, more often I get the screen divided into six rectangular areas all garbage, and with a pinkish/red predominance. This is getting very very old .