Factual error: In the flower garden when Elizabeth, Jeremy and Harry return after they become disappointed with "outdoors" Mom, Miss Cavour shows them a flower she calls a zinnia, but it is actually a morning glory. A related error is that morning glories don't come in multiple colors on one vine. (00:21:00)
Audio problem: When the kids are riding back from Miss Cavore's house on their bikes, their is some dialogue between them. In one of the shots we can see them talking, but in the next shot we hear them talking but their lips aren't moving.