Other: On the first day at Stuart's apartment Leopold wears some green 19th century trousers he wasn't wearing during his time travel, and which surely weren't part of Stuart's wardrobe.

Continuity: When Stuart is on the phone with Kate and tries to explain who Leopold is and why he is with him, the clock on his wall moves back by about two minutes when she sits down.

Continuity: During the dinner at her place Kate has both her sleeves pushed up to the elbows, but after she takes some dishes to the kitchen there's one brief shot from behind where the right sleeve is pulled down.

Continuity: At the end when Kate arrives at the uncle's house, Otis says "what seems to be the problem?" The doorman looks up at Otis, but the very next shot is Kate and the doorman is looking at her.

Factual error: Otis elevator is called that because Elisha Otis invented the modern elevator in 1859, 17 years before the movie takes place. It had nothing to do with the Duke of Albany.

Continuity: Stuart has pictures from the ball at Leopold's that show Kate standing at the back of the room looking in the room. At the end of the movie, you can see the set up for that picture. However, for Stuart to have *taken* that picture, he would have to have been standing on the platform with Leopold to take the picture, but he's not there.

Continuity: At the dinner at Kate's Charlie stands up to prove his manners. His fork is empty, but when we see him standing there's some food on it.

Continuity: When Kate comes back home after the punctured dinner with J.J., her hair is freshly done. Even if she had ample chance to do this, it's out of the question that the rather messy style she had chosen for the dinner was not intentional on such an important occasion, and there was no reason to change this afterwards.