That's a little vague, but maybe that's right, and DirecTV is following specs, so when you can't get your AVR to work with DirecTV 3d channels, it's the AVR's fault. But why should I care whose fault it is? Am I an HDMI enforcement officer? I just want my equipment to work to do what I want, and DirecTV is blocking a TV signal in some cases, when there is no apparent point to it. It is just very irritating. Even supposing DirecTV is within its rights to frustrate some of its customers this way, does that mean they should do it?
I don't agree with the other posters that Directv is at fault here. Their configuration says that if you do a direct connection with a compatible 3dtv then it will work fine and so far that has been proven to be true. Unfortunately all the people it works fine for aren't the ones bitching here about a problem that is probably caused by their incompatible equipment connected between the Directv receiver and the 3D TV.
Another good example is Directv's Dolby Digital 5.1 output. If you go from a Directv receiver directly to the AV receiver DD5.1 works flawlessly. Like most other Directv customers I discovered most tv manufacturers cripple the optical/coaxial digital outputs on the tv so only OTA HD outputs to AV receivers properly and audio passed-thru doesn't. Is that Directv's fault? No. It is a nuisance? Yes. But it's still not Directv's fault. If I want proper DD5.1 audio I connect the satellite dish receiver, blu-ray player, whatever, directly to the AV receiver. If I want crippled DD audio I pass-thru the tv.