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: In the restaurant scene, Sky bets Nathan would not be able to tell what color the bow tie he has on. Nathan says "No bet," pulls down his tie, and sees "polka dots." Polka dots is a pattern, not a color. The colors of Nathan's tie is black and white.