The Sound of Music (1965) - 4 major mistakes

Revealing: In the scene where Captain von Trapp takes a Nazi flag and tears it in two pieces you can see him searching for the correct place to tear. If you look closely you will see that a small incision has been made already so it tears more easily.

Continuity: In the scene in which Maria and the children are in a carriage singing Do-Re-Mi around Salzburg, at one point (when she is sitting facing the kids) she passes a shop that is painted in a very distinct color and with a distinct sign (it begins with an F: Frachts?), and a few seconds later, as she turns around to sit forward in the carriage, they pass the same store.

Revealing: When Gretl runs up to Uncle Max saying, "Can we really keep the puppet show, Uncle Max?", you can see Marta in the background begin her cue too soon as she starts to run up to Uncle Max in the middle of Gretl's line, but quickly stops herself. Then after Gretl finishes her line, Marta carries on and runs up to Uncle Max with the rest of the children and says her line.

Continuity: 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.