Factual error: Throughout the film the characters are often seen riding in M151 jeeps (horizontal grill slits) which were not in production until the Vietnam era. Odd because they did have a few correct era Willy's jeeps on the set, usually seen in the background
Factual error: The San Francisco house that Paula Prentiss leaves in order to catch the trolley to meet with her husband Tom Tryon's arriving ship is located on the corner of Lombard and Hyde Street. Famous for being the most crooked street in the world, is a mile and a half from the piers. In a later scene they are indoors when Tom Tryon pulls a shade down, you can see the San Francisco Bay Bridge and piers just below. This view would mean the house has moved to San Francisco's Telegraph Hill, the only location with such a clear view of the bridge, which is quite a distance away from the house's original location.