mnassour, I'm watching KERA-13. (Actually, I don't think Dish has the KDTN-2 on the dish, do they? Maybe it's on 61.5...)
boba, those blue spots are really subtle. The first night I saw them about a week ago, it took me awhile to really see it. They flash in and out really fast. Look for them in darker colors, especially around movement. Most of the time they're blue, but there's occasionally red ones too. They don't have even edges, and are about 1" long on my 36" screen. I even tried catching them on s-vhs tape. Even that's hard for some reason. I taped some golf where the dots were very visible, but then when I frame-by-frame advanced the tape, it was very hard to freeze one. Very strange. By the way, I have a 4-year old model 5000 receiver.