I've known for a long time I could switch to an SD channel and not get any sound until I performed a new handshake with my AVR (Pioneer Elite VSX-21TXH). This basically required switching away from the SAT HDMI port and back.
Now, when an SD commercial pops up on an HD station, there will be no sound. When the HD show returns, so does the sound.
I believe this is new behavior and may be coincident with the latest update. Or maybe I never noticed before. I have no idea whether it is the Hopper, the AVR, or SD commercials no longer come with sound!
I haven't thoroughly fleshed out this problem by performing some tests like seeing if it happens during a recorded show, if it happens if I rewind into the commercial, if it happens without the AVR, different HDMI ports, etc.
Anyone else noticed anything like this?