Revealing mistake: In the scene in which Mark Smeaton is being tortured to force a confession, the actor's mouthful of modern silver tooth fillings are plainly visible as he screams.
Other mistake: As Anne is about to be executed for adultery she begins recalling the important events of her life since meeting Henry VIII. She counts each of the wooden stakes numbered "100 Days" and recalls various events involving she and Henry. There should be 10 to account for the 1000 days but there are only nine. (02:13:00)
Queen Katherine of Aragon: She's new.
King Henry viii: The Boleyn's youngest daughter, newly returned from the French court. Do you like her, Kate? Shall I keep her here at court to cheer you?
Queen Katherine of Aragon: Whatever you command, my lord.
King Henry viii: Suppose I command you to give me a son?
Queen Katherine of Aragon: Were it to God I could, Henry.
King Henry viii: Amen, but you cannot - because our marriage is a curse in heaven and hell, madam.