Yes, I bought my copy via the LAT website. I'm quite sure now that it must be an early pre-distributor copy. I'm going to have a look on Amazon now as I'd like to get the other version. The extra footage sounds interesting.
Checking my existing copy (a pre-distributor copy) using the DVD software on my computer, I see that, although it is in the American display format, not PAL, it isn't set to R1. The default region before a region is set, is R2, which covers the UK and, I believe, France. As my TV is compatible with PAL and the American display format, this explains why the DVD will play for me.
I'll get back to you regarding whether the distributor version with extra footage will.