Continuity mistake: At the start of the quicksand scene, Campanella is carrying his jacket over his shoulder in the initial shot but not in the next one. (01:01:21)
Visible crew/equipment: In the scene where Jack approaches Parry's bed, a crew member is seen on the right hand side of the shot wearing a walkie talkie. He inches out of frame in 3 or four seconds. (01:51:05)
Continuity mistake: Towards the end of the movie, when the mob appraiser has verified the medallions are authentic, he is wearing two white gloves. He then asks if he can leave. When he stands up and gathers his things, he has only one glove on. The shot cuts away. When it cuts back to him, he has two gloves on again. (01:32:50)
Character mistake: Whoever wrote the "homicide" memo on the captain's corkboard spelled "homicide" wrong.
Continuity mistake: When Steve Martin is going berserk in the grocery store he is wearing white socks as he runs away from the assistant manager. In the next scene in the jail cell, he's wearing black socks.
Visible crew/equipment: White lighting screens are reflected on Peter's glasses when he looks up to see Rufio for the first time, and right afterwards when he runs away and bumps into a net.