Corrected entry: In the very last scene where the camera pans out, we can see the Hogwarts Express. As the camera moves upscreen, we see that the tracks suddenly vanish under the trees. This is obviously merely tree cover, but we next see the lake, with no tracks going over or around it. In the scene where they are travelling to Hogwarts, as well as in similar scenes in most previous movies, it is shown that the Hogwarts Express travels over a causeway by the side of the lake before arriving at Hogwarts Station.
Corrected entry: When Umbridge is writing the "OWLs" on her chalk board she makes three last strokes as if to make a period. We can hear the sound of chalk hitting the board. when you look after there are no periods.
Corrected entry: When Harry looks back at Neville when they are in the Hall of Prophecy after they have found the right orb, for a split second, he doesn't have the famous scar.
Corrected entry: Throughout the film they refer to Harry as being fourteen. Really, he's fifteen.
Corrected entry: We can easily see that Harry's glasses do not have lenses. However, there are some shots that his glasses do have lenses.
Corrected entry: In the Room of Requirement, Neville tells Harry that Bellatrix Lestrage is the Death Eater who tortured his parents. However, in the previous film, Dumbledore's pensieve shows that Barty Crouch Jr. did it (and was sent to Azkaban for it.).
Corrected entry: In the scene when Neville Longbottom is seen looking into the mirror and Harry approaches, we see close enough to the mirror to read the titles on the newspaper cuttings. One notes the 'Mysterious Disapearences'. The 2nd E in Disapearances is a horrendous spelling mistake, beyond what a newspaper might reasonably make.
Corrected entry: In the scene where Mrs. Figg is bringing Harry and Dudley home after the attack of the Dementors, she speaks about "the boy who was killed last year". Actually it is summer so Cedric died only a few weeks ago.
Corrected entry: During the first Defence Against the Dark Arts lesson with Umbridge, when the students are told they will not be using practical defensive spells the class is shocked as the camera pans out you hear a pencil drop and roll across the floor - even though the students write with quills.
Corrected entry: In one scene in the common room the song 'Boys Will Be Boys' by 'The Ordinary Boys' is playing, released in 2006, but this film is set in the 1990s, before the song was released.
Corrected entry: In the beginning of the movie, the radio announces the upcoming temperature in Fahrenheit. In Britain celcius would be more likely.
Corrected entry: 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 more than half a foot shorter than Neville) is actually face-to-face with it, before he ever touches it. (01:43:15)