Revealing mistake: After the woman is strangled and the people come in trying to find the little kid, the dead woman is clearly seen blinking. (00:11:25)
Factual error: The movie is supposed to take place over the course of a single summer. In one section of the film, Bobby is reading a story about VP Nixon's recent Presidential nomination, which took place in 1960. Later, he is reading a story of Maury Wills base stealing record, which occurred in 1962. (00:25:00)
Factual error: During the custody hearing, the Maryland flag in the courtroom is upside down. The rule for a Maryland flag is "black and gold, top of the pole," this flag has the red symbol at the top.
Continuity mistake: In the scene just after Joe finds his parents, when they are sitting in their trailer talking, his parents have a stuffed clown between them. Just before Joe asks them if there ever was a time when they'd be staring at the moon, the clown is slumped forward with its face not visible. In the next shot, when his mom starts her sales pitch about having clowns for sale, the clown is now standing upright between them.
Continuity mistake: When the panel of doctors are being queried by Aames, for the second time of the loop of this interview, the black box containing the mask can clearly be seen in the bottom right hand corner on the desk when the camera swings to the main doctor. When the camera pans back again, it is gone, and it is only after this that the assistant brings in the box.
Visible crew/equipment: Several times throughout the movie you can see lighting screens and lighting equipment in the reflection of the troopers sunglasses.
Continuity mistake: After the "car chase" the white car gets put in the barn. When the black car arrives it is covered in mud (so much they have to wipe it off the windscreen) from the dirt track. The white car only has a few specks of dirt.
Continuity mistake: The first time we see the young doctor doing his "lobotomy" in London Hospital (to the girl that was married to Prince Edward), Ian Holm comments on the procedure for some guest as they stand behind a glass window. You can clearly see the young doctor doing the third strike with his hammer in a reflection in the window. The movie cuts back to the young doctor and he is doing the third strike for a second time.
Continuity mistake: Gordon mentions that his wife accidentally spilled hot water on his leg and burnt it, but the actor only occasionally limps on it, although we are shown that he has an injured leg. This is mentioned on the commentary.
Continuity mistake: When Grace and Ms. Mills are sitting in the living room you can see a clock on the right, but in the next shot it's disappeared.
Continuity mistake: In the red drawing room, Freddie Nesbitt can be seen behind his wife, Mabel, putting his coffee cup on a bureau. They cut away to a wider shot, and he is holding the cup again.