We're trying to watch episode 301 of the Walking Dead that Dish is providing on-demand for free. Picture quality is great, but the center channel sound is completely gone. I'm getting ambient sounds (back channels, etc..) but no dialog. We have 2 TV, both with the same problem. Main TV is connected to our hopper (HDMI to our 7.1 AVR) and the other TV is a Joey with HDMI directly to the TV. Same symptoms on both TVs. All other programming is fine. Has anyone else seen this?