All- Not sure if you have heard of this or not, but lately I've noticed if I watch a TV program and I encode in PLII Movie, then after a while, it reverts back to 2 channel. If I flip the channel to a DD 5.1 source and flip back, it is okay again for a while.

Here is the setup:

Scientific Atlanta 8300HD w/optical connection to HK7300.

Is the problem the receiver or the cable box? Have not tried this on a DVD yet, but wanted to see if other have experienced this.

M60 VP150 2x QS8 EP500 HK 7300 DENON DVD-3910 Sony 60" SXRD