A POV on Jonathan shows him throwing green liquid on Claire Beaumont's lover's jacket. When the camera cuts to him, he is completely dry. Not only that, but the bottle should be half empty, yet it is just as full in Jonathan's hand, as when before he flung the liquid at the man.
The guest character's name "Beaumont" is misspelled in the newspaper as "Beaumond". There is no such spelling for this French name, which means "beautiful small mountain" or "hill". (The word "mont" always takes a T at the end, and not a D.)
None of the stuntmen hide their faces from the camera when they fight in the Harts living room, at the end. Their faces can clearly be seen, as well as the ill fitting wigs, which are evidently haphazardly positioned on top of their heads.
Freeway wakes up Jennifer, then Jonathan puts a breakfast tray in front of her. Jennifer wakes up in full make up, then eats breakfast without using the restroom first, or even so much as brushing her teeth beforehand. Highly unhygienic, if not unlikely, for this meticulous multi millionairess.
Mrs. Beaumont spills quite a bit of perfume on her husband's jacket, then immediately brings it to him. Yet, when he puts it on, the husband doesn't remark about it being perfumed, nor does the actor do any acting to showcase that he noticed the strong odor.
Mr. Beaumont is French, as indicated by his talking in (accented French) to his dog. Yet, he speaks English with a distinct accent from England.