Continuity mistake: Truly crashes into the pond three times: first when the kids are playing in the road and she takes them home, second on the day of the picnic when she says she has nothing else to do and will go on the picnic too, and third at the end of the film when Potts finds out he is rich. In the second of these three, when Mr. Potts carries Truly from her car in the pond, the end of the ribbons on the back of her dress gets soaked in mud, but when you see her again at the beach there is no sign of the dirt.
Continuity mistake: Minnie gives her the necklace with the tannis root inside and Rosemary holds the chain between her thumb and first two fingers. In the next shot the chain is draped over her fingers. (00:32:15)
Continuity mistake: When Barbarella first has to go down for an emergency crash landing, she puts her right arm up to her head in panic. However in the next shot it is her left arm that is up to her head instead of her right. (00:12:35)
Continuity mistake: When Finian and Og are talking in the forest, Og is kneeling on a log. He leans over and falls into the river. You can see him completely submerged. He stands up and continues his conversation with Finian while standing in the river and his hair is now completely dry.
Continuity mistake: When Thorndyke is squirting oil at Havershaw in the garage towards the end of the movie, the amount of oil on Thorndyke's right shoulder changes between shots.