Just to add to this thread, I recently purchased a 2008 GS460. When I play Elton John's Goodbye Yellow Brick Road DVD-Audio, I find certain passages missing (they are present in my home theater).
I did listen briefly to the first track of Steely Dan Gaucho DTS 5.1 (Babylon Sisters) and definitely heard the background vocals on the rear channel. I've ordered the DVD-Audio (newer release) and am anxious to hear how it is reproduced on the ML system.
I will be speaking with my dealership on this matter and have already submitted an inquiry with Mark Levinson. I would anticipate that this should be resolved with a firmware upgrade, but it doesn't sound like this has been happening (according to what I'm reading in this thread). Instead, these issues may be addressed with subsequent hardware releases.
I am so hoping the DVD-Audio issue can be resolved so I can enjoy the full range of my collection while on my daily commute to the office.
Any other information from others on this matter would be appreciated.
Thx - Mark