Continuity mistake: When Snape redirects Professor McGonagall's spell to Alecto Carrow, she falls on the lower platform. But after the camera angle changes, she is lying on the second platform with her brother Amycus.
Other mistake: In the final scene when Harry and Voldemort "connect" their wands, there is a close-up of Harry's face. Although the only light source seems to be the ball of fire between him and Voldemort, Harry's face is lit from his left.
Continuity mistake: During the final battle between Harry and Voldemort, Harry disarms Voldemort and his wand spins out of his hand counter-clockwise, then it cuts to the wand spinning towards Harry clockwise.
Continuity mistake: When Nagini (the snake) is moving down the stairs to attack Ron and Hermione, it lunges from midway down the stairs, under the archway. After intercutting a shot of the duel between Voldemort and Harry, Nagini is lunging from the ground, far away from the staircase and the archway.
Continuity mistake: During the duel between Harry and Voldemort whilst they are on the Hogwarts staircase, there's a midshot of Voldemort casting a spell. His arm is at an extreme bend with his elbow close to the top of his head, and his forearm is above his head. The very next shot from a different angle, Voldemort's arm is straighter and his elbow is not bent, with his arm a considerable length away from his head.poppingcorn
Continuity mistake: After arriving in Hogsmeade, when Harry is talking to Aberforth Dumbledore, the table by the window has two chairs on one side of the table. A few minutes later, there's only one chair on that side, and the other chair is now at the end where there was previously none at all. (00:28:00)raywest
Continuity mistake: When Filch is holding Mrs. Norris the cat's eyes are not red, but in all the other films they are.
Continuity mistake: When Ron is about to cast a spell to destroy Nagini the view of him pointing his wand starts out from behind him and Hermione, before the shot changes we see Hermione turn her head towards Ron. When the shot changes to face them Hermione is looking at the snake then turns her head again.
Visible crew/equipment: Just after Harry, Hermione and Ron have escaped Gringotts and land in the ocean, they then wash up on an island and Voldemort finds out Harry is hunting Horcruxes. During that time Harry says "There's something wrong with him". When he says that, the camera wobbles slightly indicating that there is a camera there.Casual Person
Revealing mistake: When Lupin is on the castle bridge and reunites with his wife-right after the scene where Neville beckons the dark wizards that disintegrate in the force-field-if you carefully watch the right hand corner of the screen, a very obvious green screen error can be seen in the castle window.
Other mistake: After Voldemort disapparates while Snape is dying, Harry asks Hermione for a flask for Snape's tears. She pulls a vial out of her purse. However, she hadn't had a purse during the entire battle, then has one at this moment. Afterwards, she no longer has the purse in any other scene.Kimberly Anne McKnight