Besides the out of synch audio at the beginning, I have another technical comment (something I noticed in Superman II as well). When you go from the credits to the movie at the beginning, the letterbox bars and picture go gray. It's fairly noticeable on my TV (and is yet another bug in Womble).
If I recall correctly from when I had the same issue, it's because the cropping bars are removed during fade-ins/outs so they end up not appearing black enough on some displays. It gives the impression that the main picture area fades out and the bars are fading up.
Besides that... very impressed by both the technical and plotting.
Btw, did anyone else notice Harry Potter's Uncle Vernon was one of the terrorists on the Eiffel Tower (the one controlling the nuke)?