Hi Gonk,
For me that is the only CD, so far. Others that I have tried work fine. I did try to force it into Stereo mode through the Input Config menu as well. That did not work. It did let me pick 5 channel stereo.
For my case, I am using a DVD player to feed the 970. However, that definitely worked before with my Marantz SR4400. I have tried changing DVD players.
It could be a bug.
-Sandeep