Great film! I just saw it. A tad predictable (the ending's not really a spoiler but I won't post it here this early anyway) - but if you haven't already read the book, you'll figure this thing out before it's even half-way through.
Meanwhile, the girl in the film is hot! (had to add that I love the French and their fries).
I'm not sure what all the controversy would be except that people take their religion way too seriously.
Overall, the movie leaves you wondering about questions concerning Jesus Christ's divinity - not flat out denying it. Also, it refers to Mary Magdalene as from royal lineage, not a prostitute as the Catholic Church might uphold. And it gives reasons for why the cover-up. Misogynism is the key. Believing Catholics or those who'd enjoy a good movie with an open-mind would like this movie. Those totally devoted to the church and caught up in the Papal hierarchy might find it offensive - but their point of view is portrayed (by a psycho-killer who self-flogs himself and wears pain garters but who allows his victims to pray before he kills them. He reminds me of Malcolm McDowell for some reason.
A point of discussion about the film that is not really a spoiler was whether Mary Magdalene was already pregnant with Jesus' child when he was crucified.
Anyway, at the end, just when you expect another shoot-out and chase sequence, things peacefully resolve themselves.