I thought this deserved reviving since the new trailer came out recently.
Get it here
It looks to me that they've taken nothing from the book. The self inflicted beatings of Silas, the circlice, the Magdalene.... I even caught a glimpse of ol' naked Jacques sprawled out in the middle of The Louvre.
In fact, it looks like Ron Howard has stayed fairly true to the story, whether that pleases you or inflames your indignation is irrelevant. At least, it appears what you see is what you get, which is more than I can say for a lot of other movies out there.
Personally, I enjoyed the book. It wasn't exactly thought provoking material (there are a lot of books that cover the same information much, much better) nor was it a stylistic masterpiece; it was just enough of each to keep it entertaining, which is what I assume the movie is going to be.