This issue occurs on my Toshiba HM116 (which is Costco's version of the HM196)...

when I watch the CBS football games in HD, I lose sound when it comes out of the commercial break back to the game and when it goes from game to the commercial break...

If I change the station and go back to the CBS HD channel, the sound comes back.

it happens on both the OTA channel and on the QAM tuner...

This doesnt happen on the Fox, CBS or ESPN games so it does appear to be only with CBS...

any help is appreciated...thanks...

Hmm. I wonder if anybody else in your market can confirm the same.