Continuity mistake: When Clifford (Martin Short) and Uncle Martin are talking about Clifford's prank at the gas station, the entire thing is being recorded by a taping device in the room. Uncle Martin says. "I'm gonna punish you, and that means Dinosaur World is out." And Clifford responds with, "I don't understand." However, when Clifford later comes up with an idea to use the tape recording in another one of his schemes, we again hear Uncle Martin say ".punish you, and that means Dinosaur World is out." BUT we hear Clifford respond with "That would be a mistake." Judging that this is a recording of the previous conversation, I don't see why Clifford should be saying something completely different than what he was saying before.
Continuity mistake: Towards the end, Charles Grodin gets out of a cab in the rain and goes across the street, but in the next shot his hair is completely dry.
Continuity mistake: The necklace given to Sarah by her boss changes lenghth significantly many times throughout the film.
Chosen answer: There were scenes that were edited into the television edition of the movie, but weren't included in the VHS or DVD edition, and this was one of them. Reference: http://www.imdb.com/title/tt0109447/board/thread/49571041.