Continuity mistake: After Hall has been shot in the leg in the simulation of LA 1937 the hole in his trousers and his injury disappear, as seen in the fight sequence at the pool. Hall even uses his leg to hit the bartender in the stomach, what would have made this very painful if he had been shot there.
Continuity mistake: At the start of the movie when the family is sitting at the dinner table discussing their highs and lows of the day, the plate of food in front of the daughter changes. The first shot when she is complaining about camp, her food is visible as three separate items (meat and two vegetables). When the camera comes back to her, the food is all mixed together on the plate. When the shot switches back to her a third time, the food is three separate items again.
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.
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.
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)
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)