I agree. (my sister & I are watching it on HBO right now) For one, it left out a lot of things (like Ron & Hermione being prefects, & Ron making the quidditch team), some of which are actually important to the story, like when they were cleaning up in Grimmauld Place & happened upon the locket. They left out Mundungus Fletcher & Peeves completely, they didn't introduce Tonks to the watchers of the movie (& my sister wouldn't quit asking me "who's that?"), &, most importantly, they've left out the fake galleons & the mirror that Sirius gave Harry. They both become very important in the last book. Also, they didn't tell the whole prophesy like in the book.