When Wasey and Miss Tatlock catch up with Faraday in the ship's cabin, the amount of shaving-foam on Faraday's face varies between shots.
When Madonna is lying in the pigsty, mud on her cheek keeps appearing and disappearing from one shot to the next.
When the street gamblers get angry they start chasing Penn and Madonna immediately almost within grabbing distance. In the next scene Madonna and Penn have managed to extent their lead to 50 yards in a single second and even have time to spare to climb in to a rikshaw.
In the harbor scene when Gloria meets Glendon most ships at the back have flags of communist China that did not even exist at that time (1938).
During the bathhouse scene Justin tells Glendon that the Chinese use tomato juice to remove the stench of skunks.
Of course there are no skunks in China. Skunks live only in North America.