When Karen turns the dial of the IV, she reduces the dose instead of increasing it.
At the Christmas service, the congregation use the hymn book to sing "Barn Jesus i en krybbe lå". However, this song was not included in the hymn book of 1953 (which would be the one used in the movie) as it was not considered a "proper" hymn until 2003, when it was included in the newest version of the hymn book.