Other mistake: The snow globe from the original is in the loft in the new film, but in the original film, as Mary was leaving the Banks house while they flew a kite, she packed it in to her carpet bag.
Other mistake: Willowdean is disqualified for not having her talent costume approved - but the girl who gets 2nd runner-up [Millie) is also wearing a different costume than the one she had approved, and she is not disqualified.