Continuity mistake: In the early scene where Frank Jr. and Sr. share a hug in the apartment building, as Frank Jr. hugs him, Frank Sr. lowers his jacket down with the right sleeve just above his elbow; however, in the next shot, the jacket moved back into its original position, with the right sleeve still completely covered. (00:17:50)
Factual error: When Wyatt (Kevin Costner) becomes the sheriff/deputy/policeman of Wichita, Kansas, you can plainly see mountains in the background - there aren't any around there. (01:04:47)
Continuity mistake: Nicholas Hammond (Friedrich) was not a natural blond. The first scene to be shot involving him was the "My Favourite Things" scene and you can see that his hair is pale auburn. After this scene was shot, the directors thought that he would look better if his hair were lighter, so they applied an early form of bleaching agent to his hair. In scenes which were shot after this (notably the children's first entrance to meet Maria which occurs before the "Favourite Things" scene) his hair is very, VERY blond, almost white. In fact, if you scrutinise his hair closely throughout the film, it is a different colour in practically every scene, depending on when the scene was shot and how much of the bleaching agent had been applied.
Continuity mistake: The word "DIREKTOR" written on the glass door of Schindler's office is little in one scene and bigger in another one.
Revealing mistake: There is a scene where a prisoner is executed by guillotine. Just as the blade would hit the man's neck, the view/scene changes slightly. The dummy used for the man's head can be seen.
Continuity mistake: During Prince Rupert's first appearance, he greets his uncle King Charles I by doffing his hat and putting it back on. In the close-up shot he is holding his hat in place but in the wide shot his hand is on his side.