Factual error: Part of the movie takes place in Vienna, Austria. Although the number plates of the cars are like those in Austria at that time, neither the road markings nor the street car which can be seen when both Steve Martin and Kathleen Turner are "climbing" outside their hotel look like those in Vienna.
Revealing mistake: When the cat rips the painting, it is already damaged before it touches it.
Other mistake: Steve Martin, a surgeon, never once wears a surgical mask while performing any operation.
