Ooops, I forgot one:
4. There is no reference to Aunt Petunia knowing about dementors. There was no howler to her which said, “Remember my last”.
You can tell that a scene was chopped between the owl delivering the letter and Harry's foster family getting into the car with Petunia looking very upset. I was unhappy at the choppiness of the editing. I think the movie was originally closer to two hours, but the director was ordered to make cuts to bring it to 2:18 to be able to squeeze in more showings/day and increase profits