Sorry, I'm sure all of your dedicated players output DD5.1 just fine, but it's just not an option for The Fifth Element on PowerDVD or Arcsoft TMT (I haven't tried WinDVD, but I always hated it.) I tried again, every audio option available. It only gives me the option of two english tracks, presumably the PCM and TrueHD, both sound the same, neither will give me DD5.1. Incidentally, the French track does play in DD5.1, so the player can decode DD5.1 from the disc, it just doesn't seem to know how to play the hidden english DD5.1 track. Perhaps a future update would fix this, but my player has the latest update as of now.
On the topic of PQ, holy crap, what about that digital matte job in the scene where the spaceship takes of from earth?! Did anyone else notice that horrible greenish trapezoid around the ship against the black backdrop of space? I never, ever noticed it on the dvd. One of the things I notice most about Bluray is the immensely improved color depth, but this is one example of when more information and clearer picture is not so great. Luckily it only takes a minute to forget about it, but when I saw it at first, I had to rewind to make sure I wasn't seeing things. I guess they didn't figure on HD when they skimped on the matte job there.