Continuity mistake: When Napoleon takes some snuff, he puts the box back on the map, but in the next shot the box is now on the table near Bugs.
Continuity mistake: When the Tartar princess Bortai is first shown, and throughout the first part of the scene when John Wayne and Pedro Armendáriz ride to check her out, she lies in a litter shrouded in shadows or perfectly lit, depending on the shot. (00:03:40)
Factual error: The opening scene of the movie shows William Pittenger receiving the first ever Congressional Medal of Honor, but in fact he was the fifth recipient.
Character mistake: When Henry Fonda is led to his cell, shot in a prison in Queens, a real inmate yells "What'd they get ya for, Henry?"
Continuity mistake: When the shoemaker tells the elf how he can run his business without elves, the paperwork behind the elf changes position between shots.
Continuity mistake: After his meeting with Julia, Winston at home opens the drawer and in a close-up pulls the diary out from under a stack of papers which he lifted with his left hand. The angle changes, and his left hand is on the edge of the drawer, and not supporting the papers any more, nor any paper is visible. There's also a pen on the table that should have been visible before, but wasn't there. (00:36:25)
Continuity mistake: During the opening conversation between Butcher and his lawyer, the shadows on Lon Chaney Jr. switch place depending on the angle - in the shots with the camera behind him, the bars cast a shadow on his neck and side of the head that is not there in the frontals. (00:01:30)