[Tetsu Deinonychus]

The only major costume change I noticed was making Nite-Owl look more like Batman. But, with a recent Batman movie fresh in peoples minds, it's a change that makes sense.

I would also like to say that I liked the ending better in the comics, but the movie wouldn't have had time to set the phony alien aspect up like the book did. I think the ending they did use works okay (and I agree with what Proto just said on whether Veidt's plan would work).

I think the Nixon still being president thing might confuse some film-goers (it was a little better explained in the comics), but that's no biggie. As for his nose, I'm not sure how else they could have made that guy look like Nixon (at least it wasn't a full Nixon mask).

Any time a book/comic is made into a movie it's bound to lose something. But, I think they did a great job with what they could squeeze into it (I'm looking forward to the extended edition).

Again my only complaint is that Veidt's Bond-villain-vibe telegraphs an ending that's a total shock in the Graphic Novel. Other than that, I think it's as good as we can reasonably expect.