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Trivia
In the scene at the beginning of the regatta race, on the Barnacle, the shot changes to Laurie asking Sandy: "Mommy can I play in the basement with Yorku"? The voice however is not of Laurie, but instead is Jennifer making a young child voice. Source: http://www.fast-rewind.com/making_summerrental.htm. See more...
I'm afraid there aren't any mistakes listed for this film.