Factual error: This movie takes place in 1850, but the "Confederate States" and "Confederate army" are mentioned. There was tension between "free" and "slave" states in 1850, but the American civil war was 11 years in the future.
Factual error: One of the lamps during the party scene has a light bulb.
Continuity mistake: In the scene when the man on the horse tries to get the case, you can plainly see that his scar changes from dark to bright red and then back again.
Other mistake: Toward the end where Zorro is trying to catch the wine bottle that he tied to the train to explode, the wine bottle goes from being completely underneath the train to being tied on the outside in plain view and back again.
Factual error: Clothes hangers were first invented in 1860, 10 years after the movie takes place. A scene in the market place features those hangers.
Factual error: The locomotive pulling the train carrying the nitroglycerin has a 2-6-0 wheel arrangement. The earliest 2-6-0 was built in 1853, 3 years after the film is set, and had their leading axles mounted directly and rigidly on the frame of the locomotive, rather than on a separate pivoting truck as the engine in the film has. The engine overall more closely resembles an 1880's vintage engine than an 1840's engine.
Answer: Compromised means that her cover was blown.
Myridon