Continuity: During the scene where the Fat Lady is missing, the students are gathered on the stairs and Fred and George are on the top of the stairs, right next to each other. In the shot right after Ginny says, "The Fat Lady, she's gone," one of the twins is on the left, at the foot of the other staircase. He could not have moved that fast, because the two are standing beside each other when Ginny talks.

Revealing: Between the shots of Marge floating out of the house and later when Petunia runs to Vernon on the grass, there are many significant changes. The short brick walls that edge the Dursley garden are actually different bricks, different grout and are even aligned differently between these shots. The bushes along the wood fence are at least 2-3 ft away from the corner bricks in the first shots, but in the last shot are aligned with the corner. The height of those bushes go from being way above the top of the wood fence to being at least a foot below. In the first shots there are small metal plaques that are attached along the top of the wood fence, but in the last shot they are gone.

Continuity: When Fred and George give Harry the Marauder's Map, Harry opens it up and on the right is Dumbledore's study. In the close-up shot of Dumbledore's study, the map is drawn with much more elaborate detail for fun and dramatic flair and the actual words of the interlocking circles are written on the map extremely differently than the previous shot.

Continuity: As the Knight Bus begins to appear, Harry falls back onto the ground, leans on his arms and in the front shot his sweatshirt is off his right shoulder, but in the next side shot, as he still leans on his arms, both sides of his jacket are properly on.

Continuity: In the first exterior shot, as the Dursleys eat dinner, both sides of the kitchen window (above the patio set) are closed. When Harry says, "Oh yeah, I've been beaten loads of times," the right side of the window is clearly open, as the window's diamond shaped pattern is only towards the left side. It's also visible when the lights flicker and the window curtain on the right blows in. In the last shot, as Marge floats away, both sides of the window are closed again.

Revealing: After Harry's first ride on Buckbeak during Hagrid's class, before Buckbeak cuts Malfoy's arm with his talon, when Malfoy holds his arm over his face, the pre-cut and ripped sleeve is visible in this close-up.

Continuity: When Sirius flies off on Buckbeak, the ground on which he takes off from is a perfectly clean stone ground with nothing on it. Yet after Sirius has flown off, Harry and Hermione run across the same ground, only now it is covered in dead leaves, grass and mud, etc.

Continuity: When Harry first sees the Patronus with Sirius, from Harry's POV it is clear that the Patronus light contracts entirely into the wand, while the area around the wand is still visible, and then he collapses. However, when Harry casts the spell later into the movie, Harry collapses on the other side of the lake, while the light from the wand is still quite large.

Continuity: In the Shrieking Shack, Harry grabs Sirius Black and throws him to the floor. There are many black marks on the floorboards, like paw prints etc. Although Sirius doesn't move when Harry first throws him on the floor, the black marks on the floorboard near Black's head change between the first wideshot of him on the floor and the following closeup and in subsequent shots as well.