In advance of a dinner party with Linda's family, Jeff and Linda are offered a cocktail by Sky. Linda is wearing a noticeable corsage on her right shoulder. However, when they enter the house for dinner, the corsage is missing.
Near the end of the film, when Jeff and Linda are pulled over by the motorcycle cop, in the long shot, their car has a tall, fancy, sculpted radiator cap. But in the closer front (studio) shot, it is missing - as it would have probably obscured Greer Garson's face. When they subsequently arrive at the judges house, the ornate radiator cap is back in place.
When Greer Garson falls into the muddy water, soaking herself up to her shoulders, there is a cut and she is shown with a smear of mud across her cheek, though it has never touched the water, and the mud is much denser and darker than what she has fallen into. It is clearly a picturesque addition.