When Marie Antoinette and Louis XVI finally are alone after their wedding, she asks him to sit and talk. As she is shown beginning to sit on an ottoman to the right of her chair, the scene cuts to Louis sitting on his chair. When Marie is shown again, she is sitting on her chair.
At the time of their wedding, the Dauphin, Louis, was 15 and Marie Antoinette was 14. Norma Shearer could (barely) get away with portraying a 14-year-old (as she portrayed a 13-year-old Juliet in ROMEO AND JULIET (1936) because many noble/royal females were more mature and had regal bearing), but Robert Morley looked 35, not 15.
It is indicated that Marie Antoinette became quite accustomed to France and the French way of life. In reality, she never did, which was one of the things that caused the French to hate the native Austrian royal more. In letters to her mother and siblings, she would write how much she missed her native country, and until the day she died, she loved only the Holy Roman Empire, never France.
When the mob storms the palace, a soldier's bayonet wobbles, demonstrating that it is not made of cold steel but of rubber.
When Marie and Louis' first wedding anniversary is announced, the bells are heard change-ringing. This requires the bells to completely be rotated by a rope wound on a wheel, and, until the 19th century, was strictly an English way of ringing bells. The bells shown are swinging from trunnions in the normal French manner.