Character mistake: Before the Megarace, Rez looks back at the camera and says that they'll try to help him out-but you can see Juni's tires in front of Rez's car. In a shot before this one, Rez says Arnold will crush Juni-looking at the camera, which is in front of Rez.
Character mistake: In the scene where the photos of Daphne are flashing by, you see her in a photograph which was supposedly taken at the Chelsea Charity Auction. In the caption, "auction" is incorrectly spelled "aution."
Character mistake: In the sequence when Tom is on the phone trying to find a babysitter, he repeatedly says he needs a babysitter for 12 children. However, Charlie, Lorraine and Nora, who does not even live at home, are much too old to need a babysitter. (00:50:45 - 00:51:25)
Character mistake: In the scene where the dentist is doing a root canal, Bloat says "rubber dam and clamp installed?" and another fish replies "yes", but when the picture goes back to the dentist and patient you can plainly see that there is not a rubber dam on the patient. A rubber dam is a large piece of latex attached to a metal frame, to keep water from the dental handpiece from going into the patient's mouth. Although all of the dental jargon in the film is precisely accurate, this device would have been very noticeable.
Character mistake: After the things let the dog out, Larry calls Joan and tells her that the kids let him out, and he will get him (the dog). Later, when he's downtown with the dog, he has the line about "when Joan finds out you've escaped, Conrad's out and I'm in". Where is the surprise? He already called her, so she knows!