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.
Continuity mistake: In the cemetery, when Harry stands trapped at the statue, the ripped sleeve and arm cut are visible as his hands grasp the sickle handle, and they both differ between shots.
Continuity mistake: When Harry is with Neville at the lake, Hermione, Ron and Ginny walk over. Then, as Hermione approaches Harry, her striped scarf noticeably changes position around her neck in consecutive shots.
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: During the Hungarian Horntail challenge, the dirt smudges on Harry's face noticeably change in consecutive shots, within the same time frame.
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: 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: When Harry is to meet Sirius in the common room the camera moves in on him as he walks towards the newspaper lying on the chair. You can see a table there as well with two books on it. When it cuts the books has been replaced with several other items.
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.
Continuity mistake: When Barty Crouch places the chalice on the table he has his hand under the piece of cloth lying on top of it. When it cuts to Dumbledore you can see Barty in the background with his hand outside the cloth.
Continuity mistake: As Dumbledore calls out Harry's name for the Tri Wizard Tournament we see Ron sitting behind looking rather annoyed. We see him sitting up and looking to his right as Harry walks towards Dumbledore. Then as the camera switches angles he is now leaning forward.
Continuity mistake: After the 3rd task, as Moody is taking Harry back into the school, the camera cuts back to the students. Neville stands to the left (viewer's right) of Viktor Krum and the Bulgarians. In the next shot Neville stands to the left (viewer's right) of a girl, who is seen in the next shot standing beside Ron, Hermione and other students (not the Bulgarians); Neville is out of place during these shots.
Continuity mistake: When the TriWiz chalice is revealed the camera zooms in on the chalice and you can see there is no one standing near it. When it cuts Igor is suddenly standing right behind it.
Continuity mistake: In the dining hall, when Ron unwraps the box with his awful dress robes and "bonnet," the position of the wrapping, box, etc., differs between shots.
Continuity mistake: During the scene where Harry is in the Prefects' bathroom after he has submerged the golden egg in the water, his wet hair keeps changing positions as he's talking to Moaning Myrtle, even though he doesn't touch it. Harry's hair changes position in consecutive shots, during other scenes in the film as well.
Continuity mistake: In the common room, when Harry meets with Sirius, there are a stack of logs at the left of the fireplace which differ between shots.
Continuity mistake: While Sirius speaks with Harry in the common room, the sweater at the corner of the couch changes position during this scene.
Chosen answer: Dumbledore did not know that Voldemort set a trap inside the maze. Unlike the book, there are no magical creatures or riddles to overcome inside the maze. What Dumbledore is referring to is a test of courage. The four champions must overcome their individual fears in order to successfully navigate the maze and win the tournament.
raywest ★