nightline

Revealing mistake: When Harry and Ron run at the wall to get to Platform 9 3/4 if you watch Hedwig's cage when they tumble over you can see a toy bird that is glued onto the perch. (00:22:50)

Continuity mistake: There is a scene where Harry is talking to Ginny in the Chamber, and he is holding his arm right below the wound. In this shot Harry has blood on his hand. When Ginny notices the wound, Harry moves his hand up to cover it. Now his hand is spotless. In the very next shot, however, Harry has blood on his hand again. (02:16:30)

Continuity mistake: In the scene where Harry is stabbing Tom Riddle's diary for the last time, he closes the book and we see a close up of its cover, covered in ink. In the next close-up of the diary its cover is clean, and a small blue dot (where the ink subsequently squirts from) is visible in the centre for Harry to aim the tooth at. (02:15:45)

Visible crew/equipment: In the dueling scene, when Snape pulls Malfoy back onto his feet, a cameraman is visible kneeling down on the far left of the screen (Widescreen version only). (01:07:46 - 01:20:00)

Revealing mistake: In the scene where the students are in Professor Lockhart's Defence Against the Dark Arts lesson you see that when Professor Lockhart lets out the Cornish Pixies, two of the pixies pull Neville Longbottom up by his ears and hang him on a chandelier. Because the pixies were computer-animated, they had to put clips behind Neville Longbottom's ears to make it look like he was being lifted up by the pixies. When he was dropped onto the chandelier by the pixies, you see his ears are still in a stretched position where the clips are. (00:37:00)