Corrected entry: In the first film, when they performed the spell "Windgardium Leviosa" they had to hold up your wand to keep the spell occurring. In this film they only have to say the spell but did not have to hold up their wands. You can tell from the feather levitating in the last film and the cupcake levitating in this film.
Corrected entry: When Harry finds the final entrance to the Chamber Of Secrets, you see a round door. This door is held closed by somewhere around five serpents which go off the edge of the door and onto the wall. therefore if you were to push the door they would keep the door from opening. There is one problem though, the door opens outwards and therefore the snakes do nothing to stop the door from opening. Since there are no snakes that act as locks on the inside of the door, the entrance apparantly was never really locked.
Corrected entry: In the scene near the end of the film where Harry tricks Lucius Malfoy into freeing Dobby, Malfoy is understandably enraged. He pulls out his wand and snarls "You've lost me my servant, boy." and then begins to shout "Avada....." before Dobby interrupts with "You shall not harm Harry Potter." Readers of the books will recognize this as the first word of "Avada Kedavra", the Unforgivable Curse which results in the instant death of the victim. An interesting way to show just how angry Malfoy was. It was also quite reckless. If anyone found out he did it, he would spend the rest of his life in Azkaban (until Harry Potter and the Order of the Pheonix anyway) if it was ever discovered he did it. And of course Dobby would have been a witness, unless Lucius killed him too. DVD subtitles actually show that he is starting to say "Vera-", but that doesn't match his mouth movements.
Corrected entry: You can see the wig line of Lucious Malfoy right before he steps into Hagrid's house, when they are coming to take Hagrid away.
Corrected entry: Hermione says they will violate about 50 school rules by making Polyjuice Potion. When it turns her into a cat/human, she has to go to the infirmary and later Harry and Ron say she will be fine in a few days. Didn't she at least get detention for doing something so against the rules? I would think Hermione getting detention would be big news considering her goody goody brainy reputation.
Corrected entry: When the Weasleys rescued Harry from Privet Drive, it showed him taking his trunk, and owl. The broom was not in his room, or packed in the car. Later when the boys arrived at school, the car ejected its contents before leaving the Hogwart's grounds, the broom was still missing. But Harry had the broom when he was playing Quittich. Seems doubtful he left his personal property at school over the summer.
Corrected entry: At the end of the movie when Hagrid comes back, the camera starts going up and you can see that Hagrid is the same height as other teachers standing near doors.
Corrected entry: During the quidditch match, the first goal we see is scored by Slytherin. When they score, ALL the players come together and fly about in some sort of arrow formation. Wouldn't it have been VERY easy for the Gryffindor team to take the quaffle and score as there's no defense whatsoever?
Corrected entry: In Defence Against the Dark Arts class when the Cornish pixies are destroying the classroom, Lockhart asks Harry, Ron and Hermione to nip all the pixies back in their cage. Hermione uses 'Immobulus' then the shot goes behind Hermione and you can see Neville on the ceiling. One pixie floats towards Hermione and part of it just vanishes. Poor computer animation?