I just got En Concert today - and it plays!
I have two DVD players and have maybe twenty PAL DVD's. Out of those I would say that seventeen play flawlessly while two others have minor "issues". But one just won't play at all... And unfortunately the last one I got (before Alizée) was the one that refused to play at all. That was about a year ago and I've been really hesitant to get anymore PAL stuff. But around Christmas when I saw that Amazon (US) had En Concert, I just had to get it. So I'm just thrilled that it plays correctly.