Questions about update 2.30 and DTS-HD MA on onkyo 606

[vonzar]

After the announcement of update 2.30 for ps3 and the ability of using DTS-HD MA (and I think Dolby True HD too) I purchased an onkyo 606. My question is why when I am watching a fox blu ray which has DTS-HD MA why does the onkyo say that it is using PCM? I used to use audio on my ps3 with digital optical cables with my old setup, but am now using hdmi through my 606. So I changed the audio settings on my ps3, it showed a list of all available audio through hdmi. It showed dts 5.1 and dolby digital 5.1 but the rest were all different forms of pcm. Why can't I listen to my blu rays with the audio on disc when I have a receiver that is capable of it and the ps3 is supposed to be capable of it? I know very little about audio, so if this is a stupid question, I am sorry, but I am confused.