Just out of curiosity, do they include the English 5.1 mix on your disc? And how is the music mix on ANH?
The german discs include a german 5.1 EX, english 5.1 EX and the commentary track in 2.0.
I can't tell if there is a problem with the music mix (if you are referring to the problem that the rear channels of music are reversed), because I only have a Prologic II setup.
Greetings
Grisan