Leslie Easterbrook says she had it in her contract to only expose her behind in this film. But the producers convinced her to wear a sheer negligee that left little to the imagination when filmed under bright lights.
When the husband is getting a haircut early in the film, you can hear him talking about how is hair is very important, but at the bottom right of the screen, his lips are not moving. There is a change in the audio tone that is subtle, but noticeable as the dialogue was most likely subbed in after filming.
When our heroes first encounter the house detective at the bar, he's in perfect shape. The next day, he suddenly sports a prominent black eye (which will vanish again midway through the film).