I just checked via Dish Anywhere, and I see random dots (they look white to me) on channel 190 SD. It's not the same pattern at all (or the same color) as what I have on SyFy HD, MTV HD, etc.
In the past, reporting bad video via email to dishquality at echostar dot com always got it fixed up fast. When I reported the HD problem though, it got ignored for about a week and then they denied seeing it, so I don't know what's going on there. It couldn't hurt to try...