[56@Yamamoto]

Hello. I'm in Japan. I heard some slight technical stoies about this issue.

Warner seems to have some problems about their encode process of trueHD on HD DVDs. For example, "The Perfect Storm" has DD-EX mix with surround back channel, but it's TrueHD stream dosen't have surround back channel. Warner's other DD-EX titles ,also.
As a matter of fact, HD DVD can use one of two kinds of streams at TrueHD. One is FBA stream, which is standard for movie soundtrack purpose, up to 7.1ch, it's bitrate is up to 18.0Mbps. And it has dialogue normalization function and dynamic range control function. Another is FBB stream, which is full compatible with MLP multichannel stream of DVD-Audio format, up to 5.1ch, it's bitrate is up to 9.6Mbps, no dialogue normalization, no dynamic range control.
It seems to me that Warner uses only FBB streams their audio encode of trueHD. Or they will have surround back channel on their DD-EX titles on trueHD sound channels.

An important thing is, that Blu-ray can use only FBA stream on its format definition. I don't know why, but I think probably FBA stream is superior to FBB in every respect. And FBB stream cannot be directly transported to FBA stream. So in this Warner's case, I'm afraid unless Warner changes their trueHD encoding to FBA stream or unless someone(most likely Dolby labo.) develop stream translate tool, Warner's BR titles cannot have trueHD audio tracks. I hope this issue resolved soon, honestly.
I rather doubt the current authoring tool Warner using cannot handle FBA tureHD stream.(For contrast, Sonic Scenarist can do it.)

It is not happy thought for me, but I will purchase "Superman Returns", "Matrix"trilogy, and "Harry Potter"series BRs in spite of their omission of Dolby trueHD audio tracks.

Please forgive me for my broken English. Good night! (In Japan, it's evening.)