Continuity mistake: In the first shot of Harry, Ron, and Hermione at the café after escaping the wedding, Harry asks if they should go back. Then the waitress walks past the camera. When it cuts, the waitress walks past the same spot again.
Continuity mistake: When Hermione removes her parents' memories at the start of the film, she points her wand at them and says "Obliviate", turning her wand hand so that her palm faces inwards/upwards. In the very next shot, however, her palm is facing outwards/downwards, with no time to change in between. (00:02:20)
Continuity mistake: When Hermione and Harry are sitting on the rocks by the cliff, Hermione is putting down a closed book. When the camera angle switches to seeing Hermione from behind, it appears the wind has blown the book open, but when the camera switches back to a front view, the book is closed again. One final switch, and the book is open yet again, flapping in the wind. (01:23:15)
Continuity mistake: When Hermione picks up the "Albus Dumbledore" book in Bathilda's house, she picks it up with her left hand, while her right hand is holding her wand only. When it cuts she is holding the book with both hands.
Continuity mistake: When Harry holds the mysterious locket up in front of Kreacher, the chains are together from Harry's POV and separated from Kreacher's.
Continuity mistake: When Harry is talking to Elphias Doge at the wedding, as Elphias says, "Well, Dumbledore was always very private, even as a boy", he is holding his drink in his hand on the table, but in the next shot, he is no longer touching it. (00:32:25)
Continuity mistake: When Mundungus arrives at the house with Kreacher and Dobby all over him, the pot, glassware, wire basket, bottle, etc. on the counter beside the sink disappear, reappear and/or change entirely in the close-up and following shots.
Continuity mistake: When Harry is holding his wand over the icy lake, the light is reflected on the surface. When it cuts to a closeup the reflection is all gone.
Continuity mistake: When Harry, Hermione and Ron confront Mundungus about the locket, he sits down in the corner chair and the side table is beside the chair, with the mess of Daily Prophets on the floor in front of the table. However, in the following shots the table is 3-4 feet away from the chair, against the wall, with one Daily Prophet between it and the chair.
Continuity mistake: In the diner, when both Hermione and Ron aim their wands at Dolohov, the boxes of Amaretti cookies explode off the shelf behind him. However, in the following shot one Amaretti box (facing the wall) is still on the shelf, then vanishes and reappears once again.
Continuity mistake: In the scene in the Cappuccino Cafe, Hermione performs "Petrificus Totalus" on a Death Eater and Ron talks about killing him. Harry says, "It's best we wipe their memories." As he says that, he is looking down at the Death Eater. In the very next shot, his head has slightly moved and he is looking straight at Ron.
Continuity mistake: On the beach when Harry is holding Dobby, and Dobby says "Dobby is happy to be with his friend", Harry is holding Dobby by his shoulder. In the next shot Harry is holding Dobby by his neck.
Continuity mistake: When the Dursleys are leaving, we see Harry standing in front of the house, quite a distance from the front door. When it cuts Harry has moved much closer to the front door. (00:02:50)
Continuity mistake: When Ron, Harry, and Hermione are sleeping at HQ, the camera shows Hermione and Ron sleeping on the couches, laying opposite ways, with their hands almost touching. The next shot is of Harry waking up, and now Ron is sleeping on the floor and Harry is on the couch.
Continuity mistake: When Harry sees into Voldemort's mind when he is Gregorovitch's wand shop, the wand Voldemort uses is the Elder wand, however Voldemort has not got the Elder wand yet. (01:07:54)
Suggested correction: Voldemort is not carrying the Elder wand, but his own wand. You see glimpses of the Elder Wand in the hands of a young Grindelwald though, perhaps you are confusing the scenes.
Continuity mistake: When Harry is in the water going after the Sword of Gryffindor he's wearing his glasses; but after Ron pulls him out of the first thing he does is reach for his glasses on the shore.
Continuity mistake: When Bellatrix looks at Harry through the gate at Malfoy Manor, her lips are a pink color. Inside the house, when she shows him to Draco, her lips are a totally different dark red shade.
Continuity mistake: In the beginning, when Minister Scrimgeour is making a speech, there are some people standing behind him. When he finishes and is being photographed, there are suddenly no people behind him.
Continuity mistake: The paper on which Luna's dad draws the symbol of the Deathly Hallows first has 4 large smudges, the largest being the one on top. Cut to the next shot and the largest smudge is now on the bottom, and their general appearance has changed. (01:54:00)
