Audio problem: In the beginning of the movie when Clark is preparing to light the Bar-B-Q, He squirts charcoal fluid out of a plastic bottle. Then Ellen squirts more fluid onto the coals out of the same plastic bottle. Listen to the sound; it is the distinctive sound of a metal charcoal lighter fluid bottle. (00:07:45)
Audio problem: When Clark is chasing the kidnapper, his car has a blowout. Even in the theatrical version, you hear him say "Darn it all," when it's clear that he's mouthing the F-word, along with something else. (01:26:30)
Audio problem: When the camera thief tells the Griswolds to take their shoes off and get in the fountain, Ellen is heard reacting to the cold water, but she hasn't even gotten in yet.