When Corey is taken to see Lambert at the warehouse, the camera is panning to the left when a moving light passes across a steel beam in the foreground, tracking with the camera.
When Bruce goes to the race track and is viewing the race through binoculars, there is a shot from behind him. It is oddly and blatantly obvious he is looking at a rear screen projection as the camera is panning on the projection and Bruce is sitting still.
In Bruce's new newspaper office, circa 1919, Croney is wearing a dress with a full zipper up the back. That style would not come into use until twenty years later, as it was considered "vulgar" for a woman to wear a dress that could come off so easily.
After Bruce and Croney discuss marriage plans on the steps in the office building, when Bruce goes to leave, there is a large, obvious shadow of the boom microphone to the left of the doorway.