Factual error: When Gregorio and Ingrid are being chased by a helicopter during their wedding, the helicopter goes between two stone posts and the helicopter's blades break the post tops off. The problem is that both of the tops fall forward, which is wrong - one should fall forward, the other one should fall backwards. (00:05:50)
Factual error: The "Russian Blue" isn't a Russian Blue at all. Russian Blues have pointed faces and green eyes. The flat faced, orange eyed kitten is a British Shorthair AKA British Blue. (00:39:35)
Factual error: When Stephanie gets in the back of the zoo wagon, she discovers a zebra back there. Then all of a sudden the zebra toots and the flames go way out of the back of the trailer. In real life that wouldn't happen because the gas doesn't come out of your rear end fast enough to have that happen.
Factual error: In the scene where Waternoose and Sully are talking, Waternoose gets himself some "coffee", which is sludgy and thick and takes quite a while to pour from the machine. Seconds later, he takes a very quick sip. Since the liquid was so thick and there was little in the cup, it would be impossible for it to pour that fast.
Factual error: At the start of the film Chihiro's father slams on the brake to avoid the statue in the road and quickly stops. There are three pedals, meaning that this is a manual transmission car (a pedal e-brake would be positioned differently), but he only puts his foot down on the brake and doesn't touch the clutch. Whilst he would stop, there was not enough time for the car to stop as quickly and as smoothly as it did. The car would also stall out but it doesn't.
Factual error: When Cindy is giving her "fossil-to-chromosome ratio" report, she calls her model dinosaur skeleton a plesiosaur. However, the skeleton is of a bipedal dinosaur (likely a hadrosaur, judging by the "duckbill"), while plesiosaurs were aquatic reptiles with flippers instead of feet.
Factual error: When the janitor is washing Crazy Legs' car, why would he leave the window open?
Factual error: Milo says Audrey is a "teenager". Which she is, but this is 1914! People didn't use that word back then. He probably should have said "adolescent" or something.
Factual error: At the beginning, after the blue virus-monster appears, some telephone wires wrap around a scientist's arm. There aren't that many wires in in a normal telephone, nor are they that thick.
Factual error: During the baby shower scene (which is on a Sunday) a U.S. Postal Service truck is seen putting mail in mailboxes.