During the scene in which Hank Henry appears as the bus driver, his name can be seen on the billboard outside the Silver Slipper casino on the background.
Joey Bishop is shown filming a commercial at his used car lot; across the street is a building with a large clock showing 1:02. When he and Elizabeth Montgomery are talking a few seconds later, the clock is showing 12:20.
When Johnny and Dare last part, they agree to meet "tomorrow night, 7:00 at The Real Tony's". The next morning Dare says "he'll be in a restaurant called The Real Tony's 7:00 tomorrow night" but it would actually be that night.
In the second half of the film, after Darien abandons her car in front of the beauty parlor, the police show up. The police later describe it as being a "1961 Ford". It is in fact a 1962 Ford (Galaxie 500 Sunliner).