34. Picnic at Hanging Rock: Wrong Hair
This one is inexcusable. Really, the movie is supposed to be set during the very beginning of the 20th century. Then, why does the hair of every single one of the girls and ladies in this movie constantly reminds you of the 70s? The reason why is very simple: Straight hair with a bit of a wave over the shoulder is a hairstyle popular in the 70s. Oh, and the high bouffants are as well.