Someone with some sense has actually watched The Da Vinci Code (and tried to read the book):

There has been much debate over Dan Brown’s novel ever since it was published, in 2003, but no question has been more contentious than this: if a person of sound mind begins reading the book at ten o’clock in the morning, at what time will he or she come to the realization that it is unmitigated junk? The answer, in my case, was 10:00.03, shortly after I read the opening sentence: “Renowned curator Jacques Saunière staggered through the vaulted archway of the museum’s Grand Gallery.” With that one word, “renowned,” Brown proves that he hails from the school of elbow-joggers—nervy, worrisome authors who can’t stop shoving us along with jabs of information and opinion that we don’t yet require. (Buried far below this tic is an author’s fear that his command of basic, unadorned English will not do the job; in the case of Brown, he’s right.) You could dismiss that first stumble as a blip, but consider this, discovered on a random skim through the book: “Prominent New York editor Jonas Faukman tugged nervously at his goatee.” What is more, he does so over “a half-eaten power lunch,” one of the saddest phrases I have ever heard.

Anthony Lane, The New Yorker, 2006-05-29

But probably the movie doesn't have all that in it.

Also, Tom Hanks has a strange haircut. I wonder if he prepared for his character thinking. "I've got it! He would have hockey hair." Maybe that will be explained on "Inside Actor's Studio" some time.