Continuity mistake: When Ben Jordan and Stan are walking around the fountain, they walk past a long glass railing. The white sneakers of the cameraman can be seen in the reflection on the glass. You know it's him because he stops walking when they stop and continues walking when they do.
Visible crew/equipment: In the scene where Sean Penn is playing with the big band fronted by the female singer, there is a microphone on a boom visible top center of the frame, when the camera does a pullback to show the whole band at the song's end. (VHS version.)
Factual error: In one scene Alvin is driving over a bridge on the Mississippi. He is going in to Prarie Du Chine but the bridge is in a different town, and he is going from east to west not west to east. The town he is driving into is Lansing, Iowa.
Character mistake: When Amy goes to Virgil's house to apologize, Virgil tells Amy that the tree is exactly 14 steps away. However he then leads her there by taking 17 steps.
Audio problem: When Alex is appointed head of Netforce, he looks down for a moment and says, "I don't know what to say." And then looks back up. His mouth is in clear view the full shot, yet never moves once during this line and is completely shut. The audio was just dubbed over the footage in post. (00:23:25)
Deliberate mistake: In the scene where Alicia Silverstone and Dave Foley are in the porno store, they cut to a guy standing behind a counter. All of the explicit shots of the videotape covers on the countertop are blurred out.
Continuity mistake: When Miss Hannigan, Rooster and Lily are singing "Easy Street" outside in the street, Miss Hannigan beats her fur shawl on the ground, and a large piece of fur falls off it. In the next shot, this piece isn't lying on the ground anymore. (00:50:55)
Factual error: The story takes place in the Pacific Northwest (Vancouver) in November and December. Washington may be known as the "Evergreen State", but there are still numerous deciduous trees - and deciduous trees have leaves that change color in Autumn (yellow, orange, red) and then shed (fall off), not stay green through December or into the new year.
Visible crew/equipment: When the housekeeper says goodbye to Shigeharu you can see the boom microphone on the right side of the screen. Next to the light hanging above the dinner table. (00:16:42)
Visible crew/equipment: Mini boom mike type thing appears in shot just as the real killer clown is walking onto the stage about to kill Kate. It is visible when he turns to face the 'audience' in the lower right hand corner.
Continuity mistake: At the end of the opening credits, Crawford finishes doing the hair of a client and puts his hands on her shoulders. She says "Crawford, you're a genius"; in the wider angle, no hands on her shoulder, and they are back in the following closer view.
Factual error: Hornblower's plan is to sail Le Reve south from Gibraltar to give him ample sea room before he heads for England. Generally, the prevailing wind through the Straits is westerly, unless there is a Levanter, yet Le Reve is shown on a port tack when it should be on a broad reach. The fog that comes up would not exist in a gale-force Levanter.
Other mistake: At the very end, Alec Baldwin drives away and other cars follow him. Problem is: two cars after Alec's car, the green traffic light turns orange, then red, and the cars keep coming. In all, 6 cars go through the red light.
Continuity mistake: Jennifer manages to thwart the nefarious plan of the kids who want to cuff her in the subway. During the scene, Heidi Lenhart's left hand grips the bar in close-ups, does not in other shots. (00:27:20)
Continuity mistake: In "Rhapsody in Blue" When we first see the drumming construction worker in his room, his alarm clock is standing up straight, but when the closeup happens, the clock is face flat on the table. (00:17:45)
Factual error: The way that Charlie makes the skeleton move is way too complex to be controlled merely by a basic remote controller (which looks like it was originally for an RC car of some sort), which can only control up, down, left and right.
Other mistake: The chain "securing" the lock on the boarded up "Metro Christian Shelter" is in some inexplicable way on both sides of a 4" board that is taut between two other parallel boards. However, when the men are using the bolt cutter, the right side of the chain extends from a hole in the middle board, and the left side goes around the side of that same board and then around a pipe that is not originally there. The board that is to the left is missing. (00:17:17)
Other mistake: Louella Parsons walks out of a screening of Citizen Kane before it ends, but later tells Hearst that Rosebud was Kane's sled. She shouldn't know that, because the identity of Rosebud is only revealed in the final scene of the movie. And if she disliked the movie enough to walk out on it, it's improbable she went to see it a second time.
Factual error: While Nate and his business associates are driving around in downtown Baltimore, the Key Bridge (which spans Baltimore harbor) is visible in the background. The movie was set in 1954; the Key Bridge was built in 1972, 18 years later. (01:33:55)