Continuity: When Dudley is lying on the ground, with the Dementor hovering over him doing his thing, notice the wall behind Dudley with huge white graffiti. First he is lying past that specific graffiti, closer to the entrance/exit, then he is lying 4-5 ft away, on the other side of that graffiti.

Continuity: There are two scenes during which Harry is shown having visions of the Dept of Mysteries while he is asleep. The first scene occurs after Harry's confrontation with Seamus in the Gryffindor common room. There are shots of Harry lying in bed wearing a short sleeve, crew neck tee shirt, but when he is startled awake by the vision of Voldemort, he sits up wearing a buttoned henley tee. The next day is the first day of DADA class with Umbridge. That last shot of Harry in the henley tee shirt was cut from a later scene. Later in the film, when Harry has the vision of Arthur Weasley's attack, he is wearing the henley tee shirt.

Revealing: In the Forbidden Forest, HRH are introduced to Grawp. Just as the giant lifts Hermione off the ground, in the shot from behind her Hermione's legs disappear below her calves; the digital lines are actually visible. Slow-mo is not necessary. (Only visible on fullscreen DVD.)

Continuity: As Harry holds the Prophecy, when Lucius says, "Don't you want to know the secret to your scar? ...I can show you everything," both he and Bellatrix stand directly in front of Harry and neither are wearing masks. The problem is in the overhead shot, when Harry says, "I've waited 14 years," two mask wearing Death Eaters are approaching Harry, who's holding the glowing Prophecy orb, but maskless Lucius and Bellatrix are supposed to be standing there already.

Other: When Dumbledore is dueling with Voldemort in the Ministry Atrium, there is a close-up shot of Voldemort as he opens his mouth wide, laughing. The filling in the Dark Lord's upper molar is visible in his newly acquired body.

Continuity: When Harry shouts, "Expecto Patronum," he points his wand at 'his' Dementor as the Patronus repels it and it flees. Harry then stands and puts his wand arm down, but in the next shot his wand is still up, pointing to his right with the Patronus in mid-air.

Continuity: In the Hall of Prophecy, when Neville spots Harry's glass orb and says, "It has your name on it," he is looking up at the fourth shelf, above his head. In the next shot of Harry he is looking up as well, but in his next close-up, the orb is now on the third shelf, and Harry (who is at least a foot shorter than Neville) is actually face-to-face with it, before he ever touches it.

Continuity: When the Dementors attack, Harry's wand falls. It changes position from the first shot; just note the cracks on the ground.

Continuity: In her office, when Umbridge adds sugar to her tea, she places the spoon on the saucer. When Harry walks in and she says, "You're going to be doing some lines today," there is a close-up of the tea cup and the spoon is gone. After a brief close-up of Harry, the spoon reappears.

Continuity: When Harry and Arthur Weasley head toward the sidewalk with the Ministry's phone booth, we see the asphalt they walk on. In the next shot of that street, there is a puddle of water precisely where they both walked puddle-free. [A common film-making technique. When shooting outdoor scenes in low light (like the overcast scene here) or at night bare asphalt and concrete are frequently doused with water to give the surface a "softer" reflection of light. In this scene you can see some water on the ground in the first shot and wet concrete on the sides of the building. Apparently between shots the director called for more water (or it may have rained, but they probably got this shot with just a few short takes). Still a mistake, but there's the explaination]

Continuity: After Harry's vision of Arthur Weasley's attack, he has the first Occlumency lesson with Snape. The windows behind Harry have a diamond shape pattern, with horizontal and vertical divisions on the glass. In the last shot, as Snape orders Harry to focus, when the camera dramatically pans out through these windows there is only a diamond shape pattern on the glass.

Continuity: When Mr. Weasley is toasting Harry in Grimmauld Place, a glass of wine appears in Sirius' hand that was not in the previous shot, and it was not given to him by anyone. Also, Sirius's position jumps from being just on the room's threshold to in the room itself.

Continuity: When Harry, Ron, Hermione, Ginny, Neville and Luna are held in Umbridge’s office, their confiscated wands, which lie on her desk (Umbridge's lies on the lace doily), change positions repeatedly between shots.

Continuity: At the playground, when Dudley and Harry have a confrontation, Dudley wears black shorts with large white designs of words and numbers. When Dudley and Harry enter the tunnel and then later, when yumpy Dudley is in his house, Dudley's shorts have completely different designs (though it is the same type of shorts).

Continuity: Before the Dementor attack, just as the sky darkens and the wind kicks in at the playground, newspaper is blown against the fence, behind Harry, but after a brief shot of Dudley the newspaper is gone then blows there again. In the following overhead shot, the newspaper is gone, but when it cuts back to Harry, the newspaper is back yet again.

Continuity: At the Welcoming Feast, in the close-ups of Seamus and Harry sitting at the table, there is a substantial space between them. When Dumbledore says, "Good evening, children," and later, when he says thank you to Umbridge, the boys are sitting right next each other.

Continuity: When Harry is in Umbridge's office to do lines, there is a framed photo of her beloved Cornelius and a bowl of potpourri at the corner of her desk. In the overhead shot of Harry, as he begins to write, the frame has moved towards the center of the desk.

Continuity: In the Room of Requirement, when Neville and Harry are alone, Neville stands before the mirror and Cedric's photo and other things are taped to the mirror. Not only does the position of the photo, etc, change between shots, the tape also differs. This occurs in other scenes as well.

Revealing: In the Department of Mysteries, when Lucius removes his mask Bellatrix stands behind him, but her entire body has been digitally blackened. Additionally, there are two distinct shots in which there is a digital shape highlighting Bellatrix's face/upper body that moves as she moves. The first occurs when she remarks, "He knows how to play," then after Lucius begins to say, "Prophecies can only be retrieved," when he continues with the words, "by those about whom" it occurs once again in the close-up.

Continuity: In the Great Hall, when Dumbledore says, "Good evening children, I have two changes in staffing this year," we see Fred and George Weasley sitting in the fifth and sixth seats, and the other students near the end of the Gryffindor table. Next shot facing Dumbledore, we see the last seven students at that side of the table and not only are the Weasleys gone, but other students differ as well. This is also seen in additional shots.