I believe I’m having the same problem but I don’t believe it is the 950. I have Comcast cable and a Motorola HD cable box. My first box would shut itself off in the middle of programs for no reason what so ever but I never had the clicking problem when changing from DD to regular broadcast. I finally got tired of the turning itself off problem and called Comcast for a new box. Now the new box doesn’t shut itself off but I have the clicking sound you are describing when I change from certain channels (DD to regular). My first guess is that something in the electronics of the Motorola box is creating a static discharge when I change channels. Any one else running Motorola gear? If not a Comcast cable box maybe a Motorola Direct TV box? Like I said it started when I received the new box so I don’t believe it is the 950. I hope we can pin this down because it is really annoying.

Lasher