Corrected entry: The back rest on Caractacus's rockets is a sawed-off baby seat.
Corrected entry: In the scene when you hear Edison (the dog) blowing on the 'Toot Sweet', in the following shots his mouth is open and you can see him start to eat it so he is evidently not blowing it. Yet you can still hear the sound.
Corrected entry: During the drive home back from the beach the first time while they are being chased by the spies, Mr. Potts drops off Truly at home where they say their goodbyes and she sings the song Lovely Lonely Man. The very next scene she is back in the car with Mr. Potts and the kids driving to his house just in time to see grandpa being carried away.
Corrected entry: When Grandpa returns from "India," he tells a story about how he shot an elephant in his pajamas, then mutters "You've heard it before." Clearly this is a joke he's told the family several times already. In fact, it's a paraphrase of a very famous Groucho Marx line from the Marx Brothers' movie "Animal Crackers." However, "Animal Crackers" wasn't released until 1931, nearly two decades after the story takes place, so there's no way Grandpa could possibly have known that joke.
Corrected entry: In most of the scenes where we see Chitty flying, she has only one propeller - in the rear. However, as Potts and his family are about to leave Vulgaria, Potts says "Stand back from the propellers!" as the wings deploy, and we can see two large propellers at the wingtips that were not there in the earlier scenes.
Corrected entry: After Truly meets Jeremy and Jemima's father for the first time, she calls him "Mr. Potts", but Jeremy and Jemima never told her their last name.
Corrected entry: When Mr. Potts and the children go for a ride for their first picnic outing after Chitty has been created, they are singing and driving through the streets of a village. Just when they sing "...the envy of all we survey", Mr. Potts raises his arm in the air, then turns forward with a seriously startled look and immediately reaches for the brake, then the scene cuts to them driving through the large open field.
Corrected entry: One of the scenes we can see Chitty's tires. They are made by "Goodyear". Since this movie takes place in the early 1900's, it is very unlikely that a tire company founded in Akron, Ohio, United States in 1898 with only 13 workers would have manufactured and shipped their tires overseas within the company's first 10 years. (01:38:25)
Corrected entry: In the scene where they are in the boat and they are going through the cave into the castle if you look closely while they are going in you will see in one shot some guy with a hat in the background (Note: only his head is visible)
Corrected entry: During the Chitty/Baron Ship scene, the smoke coming from the Baron's smokestacks changes directions a lot: from port side, to the rear, to not blowing at all (just accumulating around the boat), to port side, to no smoke whatsoever, to starboard, to port side, to starboard, to port side, to practically no smoke again, to out the rear, and changes again a few more times. (01:05:35 - 01:10:25)
Corrected entry: When everyone is at the beach for the first time with Chitty, during the scene where Potts is describing what has happened (how they are now completely cut-off [by water]) you can see that the car is on dry land and there isn't any water except far in the distance. The very next instant (during Potts' sentence) the tide somehow completely surrounds the car. (01:06:10)
Corrected entry: In the scene where Potts and the children are driving off for a picnic in the refurbished Chitty, Grandpa says that he is off to Alaska and heads toward his hut in a fur coat. As the car drives away, however, Grandpa is nowhere to be seen. (00:53:50)
Corrected entry: While singing Me Ol' Bamboo Mr Potts' hat is put on backwards by one of the other dancers, in the next shot it has been turned round the right way.
Corrected entry: During the "I Have You Two" number, you can see that the eggs in Potts' machine are brown eggs. But when Grandpa gets a single uncooked egg, it is a white egg.
Corrected entry: The film is set in pre-WW1 England (assumed from the fact that the opening credits show Grand Prix races from 1907, 1908 and 1909 and the generally late Edwardian style of the costumes). When Grandpa Potts is taken to Vulgaria and shown into the castle, he stops on the top of the steps to make a speech and starts "On behalf of Her Majesty the Queen......" It should be "On behalf of His Majesty the King", i.e. George V (reigned 1910 to 1936).
Corrected entry: Because the film stars a car, it was necessary to make several (in this case six) cars that all took turns. However, obviously no-one had thought to keep the number plates the same, so the car's licence number is sometimes GEN 10, sometimes GEM 10, sometimes GEN 11 and sometimes GEM 11.
Corrected entry: In the scene when Truley Scrumptious is walking on the beach with the children, one shot she has shoes on & in the very next shot, she is barefoot.