Factual error: When the police arrive at the Little house to take the "missing person" report, their car has a blue light on top. Police in New York display red lights.
Continuity mistake: While in Central Park, Snowbell the cat loses his collar and falls into a lake. However, before Snowbell returns home he is wearing the collar again.
Continuity mistake: In the first shot before the boat race begins, Geena Davis is wearing a hat. Throughout the rest of the boat race scene, she isn't wearing the hat.
Continuity mistake: When Stuart's original roadster is first seen in the basement, the ignition of the car disappears in some scenes. It later reappears in the roadster chase scene. (00:28:53)
Continuity mistake: In the boat race scene, before the bully crushes the first boat, you can see his 'henchman' next to him, even on a close up. After the boat gets run over, the kid changes into one with a yellow shirt saying, "Hey you can't do that!" After the bully says, "I just did," he nods over the same 'henchman' that was there before, to shove the kid out of the way.
Continuity mistake: When the Littles have their first meal together, when it shows a close up of Stuart looking at the gravy bowl, his milk has completely vanished.
Audio problem: When the alley cats are chasing Stuart and he's trying to start his car, he says "Come on" but his lips don't move at all. On top of that, wherever we see the cats running or from a distance, their mouths don't move at all when they talk.
Factual error: When Stuart is in the washing machine it completely fills up to the top - washing machines only fill up with water 1-3 inches high. When the mother goes to open the door and get him out, it opens straight away. This isn't possible, washing machines never open during a cycle.
Suggested correction: Not true, a washing machine would simply stop running if the door was opened.
Washing machines lock, so you can't open the door, or at least my front loader does.