Character mistake: Early in the movie Cary Grant is on the beach and is told he has a phone call. While conversing with Bertani, Cary Grant has the handset backwards - he is speaking into the earpiece and listening to the mouthpiece where the chord is attached.
Character mistake: When Robie is called to the phone, the attendant hands Robie the phone receiver upside down, with the cord coming out of the end he's holding by his ear. Receivers have the cord coming out of the receiver at the mouthpiece, not the earpiece. He talks on it while holding it upside down. The policeman Robie was talking to was holding the phone receiver correctly. (00:22:37)
