The problem with the movie "The Golden Compass" is that it serves intentionally as an attraction to draw in potential readers for Philip Pullman's trilogy, "His Dark Materials." Why is this a problem? Because that trilogy is a deliberate and rather serious attack on Christianity. But so was the Da Vinci Code, so what's the problem here? The problem is that both the movie and the books are aimed at children at around 12 years of age. This is insidious enough that even the USCCB (bishop's conference in the US) has been deceived to the extent that their film review of this movie does not much mention the dangers of the books.
I think that this excellent post by the American Papist must be read in order to understand the implications.