I just had an HR20 and new dish installed by DirecTV. The HR20 is in our living room, where our old Sony SAT-HD300 used to be. We moved the Sony to the guesthouse in the backyard. Here's the problem: When the HR20 is on, the Sony suffers from pixelization and squiggly lines, but only on a handful of channels like KCBS, HBO 504, and a Showtime channel. Any the problem does not happen all the time, but most often at night. DirecTV tech is stumped. They sent a serviceman out last week; he replaced the LMB section of the dish, and we thought it solved the problem, but 5 minutes after he left, the problem came back. I have another service call set for this Friday, but who knows. Cabling seems good, signal strength in excellent. DirecTV asked that I install a digital signal booster (which I did), but no effect (it's gone now). Any advice would be welcome.