Revealing mistake: Just before Marguerite tastes the chocolate Henry gives her, in the shot of the group walking past a pen of geese, the modern, flat, white soled shoes (likely canvas sneakers) the sisters are wearing are visible as they walk. (00:51:00)
Revealing mistake: When Lola screams and the glass clock smashes, you can see the small pellet that makes it shatter, go through the glass and then bounce off the wall. (00:20:40)
Revealing mistake: When Sandra Bullock and Nicole Kidman drag her sister's "dead" husband/fiancé into a room, the door hits him on the head and his eyes move.
Revealing mistake: Near the end (DVD), when Sadako comes out of the TV, you can see where her finger extensions have been placed (you can see the join between her real finger and the fake one). (01:22:50)
Suggested correction: She's not wearing finger extensions. There are small prosthetics to make it look like her fingernails are missing, but her fingers are normal length.
Revealing mistake: In the climax scene, Joe is climbing up the Ferris Wheel. He is huge, and weighs a ton, but his strong hands do not break a single lightbulb on the framework of the wheel.
Revealing mistake: The iron mark on Roy's shirt is obviously painted on. (01:16:20)
Revealing mistake: In the opening credits, there's a shot of the first film where Jacquouille takes the jewels of the dead Duke. The "dead" man moves.
Revealing mistake: You can tell all shots in the parallel world where there is writing visible are simply regular shots being reversed because Molly Ringwald's watch and ring, which she wears on her left arm and hand, suddenly are on her right arm and hand. Especially obvious in the scene where she goes over work papers with Sandy.
Revealing mistake: When Steve and Julia talk in the garden on New Year's Eve, there is plenty of snow but no other signs of cold temperature, like breath clouds. (01:21:05)
Revealing mistake: The chimpanzee, Jebo, is wearing a dress and imitating dancing in one scene. As Jebo runs off, Jane exclaims "My dress.". There is NO WAY that dress could have fitted a grown woman. It is a pretty nice fit for the much smaller monkey, though.