Factual error: During his briefing for Operation Kino, Lt. Hicox quips "Paris when it sizzles", which was not a thing in WWII; it is the title of a 1964 film, itself taken from the 1953 Cole Porter song "I Love Paris."
Continuity mistake: At the end Aldo's tie is shown on both sides of his neck then only one, and then reappears on both sides.
Continuity mistake: When Hugo Stieglitz is threatening the balls of the SS officer in the bar, his hand with the pistol is under the arms of the officer. In the next scene, when he is shooting, it is suddenly above the arms of the officer.
Factual error: After carving the swastika on the Nazi private's head that they let go, Donny tells Aldo that he's getting good at that. Aldo then proceeds to make the joke about getting to Carnegie Hall and practice. This has been a well known and common joke for years, however the earliest known written instance of this joke is from 1950. Plus the joke originates in New York and Aldo is from Tennessee, saying he's from the Smoky Mountains. So him referencing this joke in such a manner does not match the time frame at all and is way out of place.
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.
Continuity mistake: At the very start we see the farmer's daughter hanging a sheet out on the washing line. In one shot the sheet is crumpled with no peg on it and in the next shot it's not crumpled and pegged to the line. (00:02:10)
Continuity mistake: After Shosanna switches projectors on the visual cue from the film, the movie cuts to Marcel standing behind the screen smoking a cigarette. The camera pulls back from behind him showing a large billow of smoke rising from his face and he lifts his right arm up to his cigarette. But then the camera cuts to an overhead view, and suddenly his arm is down and the smoke is gone.
Continuity mistake: When Donowitz and Ulmer walk into the theater, they see Joseph Goebbels and his mistress in the box above them, to their right. They would be looking to their right to watch the movie. Later, during the movie, Goebbels, Hitler, the mistress and Zoller are looking to their left to watch the movie, so they would have to be in the box on the opposite side of the theater, where Martin Bormann was shown.
