Corrected entry: In the scene where Errol crashes into the window, ducks are visible outside. They are obviously a painted set prop, because they don't move at all.
Corrected entry: When Dobby visits Harry in the hospital, he bashes himself on the head with the bottle of Skele-Gro. Before disappearing, he puts the bottle down on the table at the foot of the bed. After he disappears and the shot changes, the bottle is back in its original place on the side-table at the head of the bed; the table at the foot of the bed is empty. (01:01:50)
Corrected entry: When Harry, Ron & Hermione are discussing the chamber, after Harry says 'But if there really is a chamber of secrets and it really has been opened,' you can see Malfoy, Crabbe & Goyle are just about to pass the group. Then it changes angles and Hermione says 'the heir of Slytherin has returned to Hogwarts...' and it goes back to the wider angle and they're right behind them again.
Corrected entry: In the very beginning of the movie, Harry is looking through a photo album. He turns to a picture of him, Ron, and Hermione. Hermione's hair is different in this movie than in the first. In the photo, Hermione's hair is like it is in the second movie, but the picture was supposed to have been taken during the course of the first movie, in which her hair was a bit different. (00:01:05)
Corrected entry: In the scene with the Rogue Bludger, Harry and Malfoy dive to the bottom of the stands to chase the golden snitch, they have to go through all the wood. But in the first movie, there is just sand there, as we see when Angelina Johnson gets knocked into the stands and falls. (00:55:45)
Corrected entry: Harry Potter is the Seeker for the Gryffindor Quidditch team; his sole responsibility is to get the Golden Snitch. When we first open the Quidditch scene the camera focuses on the Chasers throwing and intercepting the Quaffle around the field. When one of the Slytherin Chasers has the Quaffle, Harry is speeding right behind him and continues to pursue him as he swerves around the audience stands and other players until he stops and we see the close-up of him. Why is he pursuing a Chaser when he should be looking for the Snitch? (00:53:35)
Corrected entry: Myrtle points to the sink where she saw the eyes of the basilisk, but she points to a different sink than the one that is the entrance to the Chamber of Secrets