Factual error: When Dodge and Lexie are in the building running from the police, you see an exit sign. This movie is set in the 1920's, before exit signs were invented.
Continuity mistake: When Dr. Pincus joins Gwen to examine Pepe, in the first overhead shot of Pepe the things on the table around his head change in the next shot. (00:41:10)
Audio problem: The chairman talks to the mayor, and says that "no one supports you." When he says "supports", his lips look nothing like it.
Plot hole: At the end, when Chris finds the informant's phone, he sees that there are 2 voicemail messages. Instead of listening to them, he calls the last number, which reveals Abel is responsible for the break-in when he answers and in turn reveals to Abel that Chris knows about the break-in. It would make more sense to just listen to the voicemails, as Chris became immediately suspicious when he saw them. Considering Chris called the last number, he must have known that the last number was also the person who left the voicemails. Very deliberately done to bring realizations between Chris and Abel for a climax.
Continuity mistake: In the scene where Ronnie steals the Jeep, he makes a large oval out of the parking lot and back in. The outside shot is of him going counter clockwise (turning left), although a shot of the steering wheel shows a large right turn. Note that although this could be explained as turning the wheel to straiten out the car, it happens at the wrong time and the steering wheel's in the wrong starting position. (00:27:00)
Factual error: Filbert is in the southwest corner of PA. It is very far out of the way of Harrisburg and completely off the route from Philadelphia to Harrisburg.
Character mistake: Jeff mentions Mathias could have septicemia which he says is "a bacterial infection usually in the bone" However as a medical student he should know that septicemia means blood infection and has nothing to do with the bone.
Other mistake: In the final scene, where Ben realises he's inside the mirror world, everything is mirrored. However, the word ECNALUBMA is visible on the ambulance. Since the word ambulance is always written mirrored on ambulances, it should have shown AMBULANCE.
Continuity mistake: During the lunch scene, when Jake is drinking Gatorade, the amount of liquid continuously changes between shots.
Factual error: Shortly after David and Griffin jump to Japan, Griffin goes to a car dealership and takes a Mercedes. Griffin then drives on the right side of the street rather than on the left as he should in Japan.
Visible crew/equipment: When 14k's navigator is killed by the Dreadnought's wheel spikes, it shreads the car's bodywork. When the camera zooms in on 14 through this hole, the camera shadow can be seen next to the hole. (01:13:00)
Other mistake: The Sydney harbor scenes have the backdrop of the opera house. The buildings (aka "The Toaster") beside the opera house were not completed until 1998. The film was set in 1976-77.
Audio problem: During a scene where Donna is exiting her hotel room, she runs into Clair and both scream. However, Clair's scream cannot be heard, but an odd screeching sound is played in place of her scream, which continues even after her mouth has been closed.
Factual error: In Federal Reserve cash processing facilities, multiple denominations of money are never allowed to mingle.
Revealing mistake: When Budderball is rolling down the hill in a snowball, he hits a tree and falls out. You can tell it is just a stuffed animal since there is a stitch on the top of his head.
Factual error: The electrical power grid fails, depicted by a series of shots of city blackouts and equipment shutdowns. When the power goes out, the lights of an oil refinery go out as well as the flare. In actuality the exact opposite happens to a flare when powered equipment such as compressors and cooling devices fail simultaneously. The flare is not an electrically powered device and is designed to stay lit during power outages. All excess pressure is immediately vented to the flare stack within a second, causing an enormous flame and smoke cloud that will be visible for several miles.
Continuity mistake: When the Silent Monk and the Jade Warlord are fighting, the warlord wounds the monk in the right shoulder, next shot the bleeding wound is gone, but it reappears once again in the next shot after that.
Factual error: When you see the blind Syndey walk through her appartment she keeps touching the walls to feel where she is. A person who has been blind for over 20 years (as is mentioned in the film) knows the way around their own home. They know preciseley how many steps it is from room to room. They wouldn't keep touching the wall like this.
Continuity mistake: When Michael and Brenda are in the hallway of the apartment, Harry first asks them about Michael playing pro ball, Michael's hands goes from having the ball in them, to under her arm, to back in his hands in three consecutive frames.
Continuity mistake: When the barman pulls Ken a fresh pint, the pint is placed on the bar and the glass is not entirely full. The camera changes angle and the glass is now full.