Audio problem: About 10 minutes into the movie, Howard and Eunice are standing at the head of the hotel's escalator listening to Judy define the word "propriety" as she descends; instead of diminishing in volume as it ought to, the volume in this speech stays the same and even increases a little right at the end.
What's Up, Doc? (1972)
1 audio problem - chronological order
Directed by: Peter Bogdanovich
Starring: Barbra Streisand, Ryan O'Neal, Madeline Kahn, Kenneth Mars
Continuity mistake: At the airport Howard stands in front of a departure sign that says local time is 11:08, yet just a few minutes later Eunice tells Mr. Larabee that it's 12:05.
Hugh: I find that as difficult to swallow as this potage au gelee.
Judy: How would you like to swallow one sandwich d'knuckles?
Trivia: In addition to Ryan O'Neal appearing in this film we also see his brother Kevin O'Neal (delivery boy), and his mother Patricia O'Neal (woman on plane).