Continuity mistake: During the bank scene, the Joker shoots the bus driver and he falls dead in front of the bus. As the Joker approaches the Bank manager to put the gas can in his mouth, you can still see the body. But after he removes his mask and walks toward the bus, the driver's body is gone.
Picture edited by Super Grover
Continuity mistake: After Gerry gets smacked in the face by the 'broken' suspender clasp, we see the silver clasp land under the dresser. Yet, when he's moaning and lifting his leg to get onto the bed, we can actually see the clasp still intact on the front suspender that came loose, which is dangling right behind him (just look between his legs). Of course, in the next shot, that clasp is gone. Since the silver clasp is one of the plot points, this is bizarre to say the least.
Continuity mistake: When John and Catherine are in the hangar at the runway, the Cessna's tail number is N3035C. When the plane is shown in the air, the number is N3973F. When they land, the tail number has changed back to N3035C.
Continuity mistake: In the bedroom scene the girl is holding a clear cup full of beer. The camera goes off her and when it comes back she is holding a blue cup. The camera goes back off her then on her and the cup is clear again.
Continuity mistake: When Sam is in his bedroom, after he finds the Cube sliver it falls and dramatically burns a hole through the floor into the kitchen. But Sam's bedroom is over the living room (there is nothing on the ground floor below Sam's elevated bathroom, and in the first movie Jazz hides in this open space), and the kitchen is actually located between the den and dining room, at the other end of the house. If they were to follow the actual floor plan of the house, the Cube sliver would have landed in the area of the piano in the living room, but where would the fun have been in that?
Factual error: The detective played by Rory Kinnear is shown in 1951 typing a request for Alan Turing's military records. He changes a name with correcting fluid - unknown in the UK in 1951.
Continuity mistake: In the scene at the college where Callaghan asks to look at Hiro's Megabot, Callaghan's shirt is blue, but when he holds out his arm to take Megabot, his shirt sleeve is red. Later on he is wearing a red shirt at the SFTT.
Revealing mistake: While Miss Hannigan is singing "Little Girls", she sees one of her foster girls as a lamp on a table. As the camera and scene continue down the hall, a foot can be seen in the background as the girl jumps off the table to be replaced with a real lamp.
New this month Factual error: Tsunamis are caused when the epicenter of the earthquake is located in the sea. Physically, in order for a tsunami to be formed, the seabed must move abruptly in a vertical direction. In this movie, all the earthquakes are located inland, along the San Andreas fault.