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.
Continuity mistake: When Filch fires off the cannon for Cedric to go face his dragon in the first task, you see Karkaroff standing on Krum's left (viewer's right). In the next shot, the close-up of Cedric, Karkaroff is now on Krum's other side. (00:55:05)
Continuity mistake: At the Yule Ball, Hermione's hair is done up with the long curl at the back, and at times that long curl is either in front of her shoulders or at her back depending on camera angle. Additionally, even when her hair is normal, it changes in some consecutive shots throughout the film. (01:18:35)
Continuity mistake: In the Triwizard champions' tent, after Fleur picks her dragon, in the overhead shot Fleur looks up as Madame Maxime stands directly behind her, with her hands on the champion's shoulders. However, in the next shot Madame Maxime leans over as she stands toward Fleur's left, and her hands are off the shoulders.
Continuity mistake: Dumbledore wears a thin silver strand, with dangling silver balls, tied round his beard throughout the film, and the position of this strand differs in consecutive shots, depending on the camera angle. For example, when Dumbledore stands beside the pensieve, whilst speaking with Snape, McGonagall and Moody.
Continuity mistake: During the first part of the movie, Moody doesn't have a eyebrow over his Magic Eye, it is clear because you can see the stitch marks. Then when he is talking to Harry he has a bushy white eyebrow where there wasn't one before. (00:25:20)
Continuity mistake: Just before Moody turns Draco into a ferret Harry has a confrontation with him and pushes him. In the first shot right before Harry pushes him they are almost face to face. Cut to behind Harry after he pushes him and Draco has been pushed back several feet. Cut to behind Draco just as Harry says 'he's vile and cruel' and they are now almost face to face again. (00:48:40)
Continuity mistake: After Cedric Diggory is killed in the cemetery, his body changes position during the scene, particularly its proximity to the Riddle monument.
Continuity mistake: When Mr. Weasley, HRH, and the rest reach the boot Portkey, to take them to the Quidditch World Cup, in the first close-up of the boot (with the sky behind it) there are many very tall blades of grass on the mound around it. In the next shot, just as they start to encircle the Portkey there are much less single tall blades - before anyone has had a chance to stomp on them.
Continuity mistake: In the scene when Harry is talking to Sirius Black in the fire, Sirius has a large piece of wood below his right nostril in all of the close-up shots. But in the shots that are farther away, there is no large wood piece, and instead there is a smaller one that is on fire.