When Todd is proposing the job to Sophia he says, "It's up here. The bar, everything. It's all inside." When he says this, the camera is from behind him and two fingers are briefly shown pointing to his temple. The camera angle quickly changes to show from the front and only one finger is at his temple.
When Katya is having her hair combed, a fly lands on her forehead--then jumps onto the camera lens.
The story takes place in 1936, but a US 50-star flag is featured at the racetrack. This should have been a 48-star flag.
The Japanese flag should have the chrysanthemum design instead of the rising sun design.
The uniforms that the Japanese soldiers wear is inaccurate, given that the movie takes place in the years 1936-1937. The Japanese Army did not wear their rank insignia on their collars until May 1938; until then rank was displayed on the shoulder. Also, their shade was a bit darker khaki than what is depicted in the movie.
Samuel Feinstein drives the motorcycle BMW R71. Actually the production of BMW R71 began two years later - in 1938. The Chinese replica of that motorcycle began after 1956.
A song performed in a nightclub early in the movie is the original Chinese (Mandarin) version of what became an international hit for Frankie Laine in the early 1950s under the name of "Rose Rose I Love You". The original was written in 1940; the scene was set in 1937.