Does anyone else's receiver freeze when the Emergency Alert System nonsense comes on? When it comes on, I have to change the channel and go back to get the pic back. Even then, it's just audio when I go back for a while, just black screen. I saw it on ESPN News (207) today and another channel (I forget which) a week or two ago. Does it do that because ESPN is 720 and the stuff Directv inserts is 1080i? My TV always flashes black for a second or two when 1080i commercials are inserted in a 720p channel, and again when it returns to network programming.