Scott Pilgrim [Spoilerish?Not terribly]

Even if they didn't write the movie before the book I still wouldn't have much of a problem with how they left stuff out. While how they rushed things was a little annoying at times it was no big deal, the only times it would be a problem would be if someone who hasn't read the books saw those parts since they come off a little esoteric. Though I doubt many people who hadn't read the books before saw this movie.