I notified Pioneer of the problem. Here is my correspondence. I would feel more confident if the text in boldface came from DirecTV rather than Pioneer.
Sent February 8, 2011 at 11:15 PST
DirecTV broadcasts some 3D shows in 720p Side-by-Side format which is an optional 3D format for broadcasters. My VSX-32 apparently does not support this format. The result is I am unable to play these shows on my Samsung PN63C8000 TV. My understanding is that this format is optional for broadcasters but mandatory for receivers and TVs. Will Pioneer upgrade the firmware to correct this?
Received Wed 2/9/2011 2:13 PM PST
Thank you for contacting Pioneer Electronics, Inc. The receiver fully supports the 3D signals. The signal Direct TV is transmitting is not compliant to the HDMI Organization specifications. We are told they will have this resolved in the first quarter. Please contact Direct TV for full details.
Customer Service Representative