When Harry delivers the dresses to Sherwood Nash, the vehicle he is driving has the company name "Duryea" on the side. But the uniform cap Harry is wearing has the name spelled differently as "Duryea's".
Bette Davis and William Powell are shown developing film in a room with the door wide open, which would be impossible, as a developing room has to be dark.
After the trio leaves the Bouquinistes (book sellers) along the Seine, the matte background previously showing Notre Dame Cathedral is no longer there.
Bette Davis' character is excused from Sherwood's meeting with the Duchess, Baroque and Mr. Ward, and she sits down in the outer office. There is a fly over her right shoulder which begins crawling up the wall. When Snap enters and raises his left hand while talking to her, the fly takes off.
William Powell stages an elaborate revue featuring girls in ostrich-feather costumes in order to create a vogue for the feathers. Yet, in the fashion house he then opens, none of the clothes uses ostrich feathers.
When the employment agency girl enters wearing the bargain basement dress, a shadow of the boom microphone moves off the top of the door.