Does your DVD copy have a Director's Commentary track?
I bought my copy after reading that there was a director's commentary track, which I would find very very interesting after having watched "Lost Soul" (the documentary about the making of this film."
My copy arrived, and while there are a couple of bonus features (On-screen interviews), there was no commentary, kinda the main reason I bought it. I did read that the blu-ray omitted this feature, that's why I stuck to the DVD.
Does your copy?