Revealing mistake: On the train to school, when HRH are in their cabin, among the different angles that are presented during this scene are the shots in which the camera either faces the large cabin window or the aisle window, directly opposite it. It is not what is seen that is the problem, it is what we don't see. When the camera faces the large cabin window we should see the scenic reflection of the window opposite it, as the train speeds along (and vice versa the aisle window), but we don't. What we do see reflected is the light colored wall beneath the blacked out window. The camera filming the shots from this angle is positioned at that window and in order not to see the outline of the camera/crew, the window was covered.
Visible crew/equipment: In a number of shots within various scenes, the reflections of the reflector screen and set lights are briefly visible in the lenses of characters' glasses, such as Rita Skeeter's, or in characters' eyes.
Revealing mistake: When Dumbledore, Barty Crouch, and the rest are in the Triwizard champions' tent, as Madame Maxime stands behind Fleur with her hands on Fleur's shoulders, in Fleur's close-up it is rather apparent that they are not Madam Maxine's hands.
Continuity mistake: When Dumbledore reveals the Triwizard Champions, in some shots one of the Weasley twins sits beside Harry and Seamus near the wall, along with Hermione, Ron, and Neville. In other following shots, both Fred and George are sitting together on the opposite side of the table.
Continuity mistake: There is a scene where Harry is holding the letter from Sirius and we can hear Sirius's voice reading the letter. The words on the letter are different from the words we hear Sirius reading. Particularly the end where Sirius says, "P.S. The bird bites" the letter says, "By the way, the bird bites."
Continuity mistake: During the second task, just as Krum and Hermione pop up from underwater and Krum's sharkhead disappears, in this specific shot Fleur (NOT another Beauxbaton student) stands on the platform in the background and her hair is fairly dry, blowing a bit in the wind. However, in a following close-up, Fleur's hair is soaked and stringy.
Continuity mistake: In the dining hall, when Hermione begins reading Rita Skeeter's article mentioning the Hungarian bon-bon, the newspaper and Hermione's fingers change position between the semi close-up and close-up.
Continuity mistake: In the DADA class, whenever there is a shot facing the class room, we can see that Ron and Harry are in the middle of the class room and Parvati and Padma are on the viewer's right side of the room (screen). Yet, when Moody makes the spider float from Padma onto Ron's face, in the shot facing Ron, the spider floats onto his face from the viewer's left side of the room (screen) whereas it should have been the right side of the room (screen).
Continuity mistake: At the Quidditch World Cup, when the kids reach the top, in the first shot facing them their positions are Cedric, Ron, Fred/George and Ginny. Just before the shot cuts, Ginny is just about to move behind a twin, and more to the point, three members of the Irish zoom by on their brooms between Ron and Cedric. In the next shot (from behind), as the Irish are still zooming by, now their positions are Fred/George, Ron and Ginny, with the Irish zooming by between Ron and Ginny. Between shots, Ginny has moved past three people and the zooming Irish on their brooms. Don't confuse the hat wearing twin for Ginny; her hat is green with a black buckle band and the twin's hat is green stripe. (Clearer on fullscreen DVD.)
Continuity mistake: After Harry overhears Snape and Karkaroff, when Snape confronts Harry and mentions the Gillyweed, the shelves behind the ladder in the store room are quite visible. Once Snape finds the bottle of Veritaserum things behind the ladder differ.
Revealing mistake: At the first challenge, just before the Horntail makes its appearance, there is a tight close-up of the egg as Harry stands in the stone "doorway" in the background, on the left. Clearly it is not Daniel Radcliffe, but his stand-in (his face differs and he has a shorter, bowl-type haircut) who is standing there, for this one specific shot.
Suggested correction: I watched this scene more than once and I never noticed any stand-in. I would need a picture to prove it. Besides, why would they need a stand-in in this scene?
Continuity mistake: When Harry is attacked by a multitude of Grindylows he sustains numerous injuries, particularly the one on his jaw and neck. The position and characteristics of that wound repeatedly change in the following shots.
Continuity mistake: When Hagrid stabs Professor Flitwick in the hand with his fork, the fork changes places slightly between the wide shot of them and the close-up of Flitwick's hand, even though the fork hadn't been removed yet.
Continuity mistake: When Harry is on the Hogwarts Express, it is apparent that his scar is missing or very much out of place. Then during the second task, when Harry is swimming, the same thing happens.
Continuity mistake: When Ron glares at Harry in the Great Hall, he is angry with him for getting his name into the Goblet, but his face has dramatically changed from the previous shot (where he is in the background, behind Hermione).
Continuity mistake: When Hermione is walking over to wake up Ron she places a candle on the table. When it cuts the candle has moved closer to the edge of the table.
Continuity mistake: Right before the third task, Igor Karkaroff puts his hands on Krum's shoulders. In the next shot, however, his hands are off his shoulders and he is standing a respectable distance away. This change continues throughout the rest of the scene.
Continuity mistake: When Ron enters the common room, Harry places himself at the edge of the couch. When it cuts, he has moved further in on it.
Continuity mistake: During the Tournament's first task, Harry runs behind the large rock formation to hide from the Horntail. After he's summoned the Firebolt, as he's crouched down, there is a semi close-up of Harry, then it cuts to a close-up, and the position of his red and black hood on his shoulders noticeably changes between these shots.
Continuity mistake: After Harry overhears the conversation between Snape and Karkaroff, Snape holds up the small glass bottle of Veritaserum while he accuses Harry of stealing from his store of ingredients. The way Snape holds the bottle repeatedly differs between the close-ups facing Harry and close-ups facing Snape.
