Continuity mistake: In the scene where Col. Landa hands himself over to Lt. Raine, Utivich cuffs Col. Landa. Then when Lt. Raine is carving the swastika into Col. Landa's forehead, you can see him clutching at grass with his right hand, which isn't cuffed. (01:09:20 - 01:11:40)
Suggested correction: There is a clear time gap between Aldo threatening Landa with the knife and Aldo carving the swastika into Landa's forehead. It is entirely possible that his handcuffs were removed between the two scenes.
Character mistake: Hicox claims to be from around Piz Bün to explain his strange accent. However, Piz Bün isn't even in Germany and nobody around there spoke German at all. Yet nobody reacts. It's very weird that Hellström, being a German officer, would not know the borders of his own country.
Suggested correction: A lot of Germans come from Austria, or lived in Austria. To the Nazis, Austria is part of Germany. Hitler was born in Austria too.
Other mistake: At the very beginning, the first cut to Mr Lapadite he has an axe in his hand, ready to strike (and we heard two strike sounds before), but there is no log to cut. (00:03:17)
Suggested correction: He is cutting the stump. We see him actively cut it too, not only ready to strike.
Factual error: Although Dieter Hellstrom is a Gestapo Major, he has the SS runes on his uniform instead of a blank square.
Suggested correction: Nowhere in the movie is he said to be a Gestapo Major. He is SS. Even if he was part of the Gestapo, he could still be an SS officer, as the Gestapo fell under the SS and RSHA.