Other mistake: McGonagall appears as a young professor at Hogwarts, even though the movie is set in 1927 and she wasn't born, according to the official Harry Potter canon, until 1935.
Upvote valid corrections to help move entries into the corrections section.
Suggested correction: JK Rowling, who had admitted she's terrible at math, has changed her mind about McGonagall's age multiple times. First she said she was 70 in 1995 (putting her birth year as 1925), then on Pottermore she said she was born in 1935, then after this movie came out she nixed that section of Pottermore and left her birth year unconfirmed from then on. If the author who created this world can't make up her mind on how old she is, we can't definitively give her a year of birth either.
