Visible crew/equipment: In the dueling scene, when Snape pulls Malfoy back onto his feet, a cameraman is visible kneeling down on the far left of the screen.
Continuity mistake: When Myrtle is flooding the girls' bathroom, the tap that later doesn't work (the entrance to the Chamber) is happily churning out water - it's on the side nearest the door, so we see it clearly both times.
Continuity mistake: In the Quidditch scene, Harry breaks his right arm and cradles it on his chest, but when he is lying on the ground after he falls off his broom, he then leans directly on it when he sits up to get away from the Bludger. In the shot immediately afterward, he has his hand cradled in front of him again.
Visible crew/equipment: When in the Whomping Willow, Ron asks, "What's happening?" and Harry replies, "I don't know." After a few other shots, in the next two front close-ups of the boys as they scream, Harry, Ron and Hedwig are not alone in the car. A crew member's HAND is quite visible holding the bottom of Hedwig's cage and in the 2nd close-up is actually laying the cage on its side!! (Visible on DVD fullscreen.)
Visible crew/equipment: In Flourish and Blotts, when Lockhart says "Which, incidentally, is currently celebrating its 27th week atop the Daily Prophet bestseller list," the overhead camera pans up. As the camera passes his feet, Tom Felton's (Draco Malfoy) mark, two long strips of white tape are perfectly visible on the balcony floor where he stands.
Revealing mistake: When Harry is fighting the Basilisk on top of the skull in the Chamber of Secrets, you can see that there is a safety tip on the end of the sword.
Visible crew/equipment: Rushing to make Hogwarts Express at the train station, the shot opens as the camera pans Ginny's trunk and TWO marks come into view. While Ginny and Mr. Weasley push her trolley, Mr. Weasley (Mark Williams) is cued and begins to say, "10:58, come on, come on!" just as the actor hits his tape MARK on the ground below, while Percy's (Chris Rankin) trolley hits its tape mark, so Harry is visible behind him, and cues Mr. Weasley to continue speaking. In the shot when Mrs. Weasley says, "Okay" for Ginny to go and in the shot as Harry says, "Let's go," their marks are obviously gone. (Visible on DVD fullscreen.)
Visible crew/equipment: While Harry is chased by the Bludger, Hermione says, "No! Even with a proper wand you could hit Harry..." Three shots later, as Harry passes the blue Ravenclaw tower, the back of his robe flies up and the metal base of the SEAT he sits on is perfectly visible. Some shots are filmed vertically, as he sits on the attached seat with the upright broomstick in front of him, but then edited with the background plate to look as if he is lying on the horizontal broomstick. Hence the need for a seat perpendicular to the broomstick.
Revealing mistake: During the car flight (on the way to Hogwarts) Harry and Ron have gone out of control outside Hogwarts. During the scene when the car is approaching the whomping willow the car is massively out of proportion compared to when the car is in the tree.
Continuity mistake: There is a scene where Harry is talking to Ginny in the Chamber, and he is holding his arm right below the wound. In this shot Harry has blood on his hand. When Ginny notices the wound, Harry moves his hand up to cover the wound. Now his hand is spotless. In the very next shot, however, Harry has blood on his hand again.
Continuity mistake: In the scene where Harry, Ron, and Hermione are drinking the Polyjuice Potion, Harry leans toward the mirror and starts to gag or something. You can clearly see his shirt is half-unbuttoned. Then they cut away to another shot farther back. Then they cut back to him, and his shirt is buttoned up, nice and neat.
Revealing mistake: Harry and Ron's trunks are being thrown out of the car and in the shot just before Harry's close-up, Ron's trunk (the other trunk says HP) slams down on the grass. The top of this trunk has a large perfectly symmetrical hole in the center with four round marks around it, which was probably involved in the throwing somehow. In the wide shot as Hedwig is being tossed out, the trunks are clearly visible and there is no hole in either, nor is there a hole in Ron's trunk at any other time.
Visible crew/equipment: After the car spits them out and the car drives away and they are chasing after it, if you watch closely you can see the shadow of someone driving the car.
Continuity mistake: When Ron and Harry are escaping from the spiders in the flying car the passenger's side window that broke earlier hitting the Whomping Willow is not broken, you can see Ron's reflection. A minute later you see that the window is broken again.
Revealing mistake: At the beginning of the scene near the end of the movie with Lucius Malfoy fuming at Dumbledore in his office, Malfoy's hair is fanned back behind his shoulders. The lighting in the room illuminates the back of his neck, where you can see his real, short brown hair.
Visible crew/equipment: After Harry climbs up the side of Salazar Slytherine's stone head in the Chamber of Secrets, the first time the Basilisk slams his face into the stone in the wide shot, the bottom of a crew member's denim pant leg and shoe are bizarrely visible lying on a work surface, beneath the stone head's beard! The digital editors overlooked this one. (Visible on fullscreen DVD.)
Visible crew/equipment: Just arriving at Diagon Alley Hagrid says, "I was looking for Flesh-Eating Slug Repellent. They're ruining all the school cabbages." In the next shot Hermione exits the shop and runs towards Harry. On the ground is Dan Radcliffe's (Harry) red mark, which he promptly steps on just before Emma Watson (Hermoine) glances down and steps on her own black tape mark. (Visible on fullscreen DVD.)
Revealing mistake: When Ron is on all fours beginning to cough up slugs, Harry says "Let's take him to Hagrid's". Hermione mouths the lines with him.
Continuity mistake: When Errol drops the howler it lands in a bowl of potato chips/crisps. The seal to the envelope is open, but when Ron grabs it the seal is closed.
Revealing mistake: When Harry and Ron run at the wall to get to Platform 9 3/4 if you watch Hedwig's cage when they tumble over you can see a toy bird that is glued onto the perch.
Revealing mistake: In the many and lengthy dialogue scenes between Potter and Dumbledore, with countless facial close-ups, neither of them have glass in their spectacles.
Visible crew/equipment: While chasing the Snitch, Malfoy says, "You'll never catch me, Potter." In the following wide shot from the side, the SEAT support under Tom Felton's left thigh is visible, as he was filmed sitting upright for this particular shot. In the following front shot of both together, as Harry passes Malfoy, the seats that are attached to the broomsticks, to add a bit of comfort for Dan Radcliffe and Tom Felton, are visible.
Continuity mistake: As Ron's luggage cart/trolley slams into Harry's, Ron's trunk is visible. As Ron begins to flip over in the overhead shot, the trunk has five strips of brown trim - two on the edges and three in the middle. When Harry and Ron moan and get up, Ron's trunk now has four strips of brown trim - two on the edges and two in the middle.
Revealing mistake: Mrs. Weasley might as well knit like a muggle because she's not making any progress with magical knitting. In the Weasley's home and we see the magic knitting, the needle shoves into the hole, but no thread loops around and it is not advancing. The amount that has already been knitted is magic indeed since all the motion shown in the film produces no results.
Continuity mistake: When Harry cast the charm on Malfoy in the duelling club, Malfoy falls on the floor with is hair messed up. When the camera cuts to the next scene as Snape pulls Malfoy up, his hair is neat again.
Continuity mistake: In the scene where Lockhart is attempting to teach students how to cast charms for disarmarment, Professor Snape casts his charms against Lockhart. Lockhart goes flying through the air, wand in hand. The movie then cuts to a shot where Lockharts wand goes flying through the air out of his hands, then cuts back to a shot from his left shoulder where he lands wand in hand. Movie then cuts back to his front left, and he gets up without wand in hand.
Other mistake: When Harry falls out of the car as he and Ron are flying above the train, his hand misses the door handle completely and he should have fallen clear to the bottom of the gorge. However, in the next shot and after, he is hanging onto the handle quite firmly.
Continuity mistake: When Harry and Ron run into the wall in the train station, you can see the owl's cage open, but when they stand up, the cage is closed.
Continuity mistake: When Ron, Harry and Hermione drink the polyjuice potion, they all drop their glasses, smashing them onto the floor and presumably making a big mess. However, in the high angle shot looking down at Harry, there is no sign of broken glass or any potion splattered anywhere.
Revealing mistake: During the Quidditch match, just after the close-ups of Snape and Lucius Malfoy, there is a shot of Harry flying towards the camera, coming to stop, with Draco Malfoy flying in beside him and in this shot the goal posts cast a shadow on the sand. Malfoy remarks, "All right there, Scarhead?" and Harry looks down below at the approaching Bludger. Now in this shot, not only do the goal posts have a completely different shadow, there are no hoops at the top of the poles' shadows (while the angle might make them hard to spot, putting everything in a line, the shadows should at least thicken at the top where the hoops are).
Visible crew/equipment: When Ginny becomes conscious after Harry stabs the book with the fang, as the camera pans back, a semi-clear reflection of an overhead stage light is visible in the ink.
Revealing mistake: In the scene where the students are in Professor Lockhart's Defence Against the Dark Arts lesson you see that when Professor Lockhart lets out the Cornish Pixies, two of the pixies pull Neville Longbottom up by his ears and hang him on a chandelier. Because the pixies were computer-animated, they had to put clips behind Neville Longbottom's ears to make it look like he was being lifted up by the pixies. When he was dropped onto the chandelier by the pixies, you see his ears are still in a stretched position where the clips are.
Visible crew/equipment: Before the car spits out Harry and Ron, when Ron's car door opens as the seat slides out, the black steel bar that his feet rest on is visible under his right foot. Then, when Harry's seat slides out to throw Hedwig out, as the cage flies out the same foot bars are seen by Ron's seat, near the door, in the background. The bars are gone when the seat slides out to toss Scabbers.
Continuity mistake: When Harry, Dumbledore, and Lucius Malfoy are in Dumbledore's office and Harry says he will be around to save the day, his face is clean. Later, when Harry gives Malfoy Tom Riddle's diary, his face is as grimy as it was in the Chamber.
Continuity mistake: In the shot where Dobby takes Harry's letters from his robe and tells him about why he hid them he is standing in front of the dresser, you can see that the drawers in the dresser are neatly closed (with the exception of the bottom one, which is only slightly open). However, in the next shot when Dobby runs out the door with Harry chasing after him you see the dresser again, and this time all the drawers are slightly open and uneven.
Visible crew/equipment: Ron and Harry discuss the Basilisk's victims and, speaking of Mrs. Norris, Harry says, "There was water on the floor that night. She only saw the Basilisk's reflection." Just before Harry reads aloud from the paper again, the crew's gas torch canister with regulator and tip, that sits in a bucket beside another bucket, leans against the wall. (Visible on DVD fullscreen.)
Continuity mistake: In the scene where Harry slides out from the fireplace into this dark shop, he quickly exits through the front door. Just before he walks out, look closely. The sidewalk outside is bright and sunny, not like the dark and dingy surroundings that he walks out to.
Continuity mistake: When Harry is in the Chamber of Secrets and has just killed the basilisk, you can see in three or four shots that Harry is still on top of Salazar Slytherin's head. Now when the basilisk falls down dead, Riddle looks upward in anger at Harry who should still be up there. However, in the shot immediately following, it shows Harry walking right next to the dead basilisk.
Continuity mistake: When Ron and Harry crash into the Willow you can see that the Willow smashes the front side of the car and the left light. Afterwards the light is back and undamaged.
Continuity mistake: In the Chamber, when Harry runs from the Basilisk he ends up at a gated dead end, with steel bars that are embedded in a circular stone wall. When Harry crouches down, as the Basilisk's face nears, the manner in which the bars are embedded in the stone is actually quite different.
Continuity mistake: When Harry is cornered by the Basilisk the Basilisk is a foot away from his face, but when he reaches to his side to pick up the rock, the Basilisk is a metre (about a yard) away.
Continuity mistake: Tom Riddle says, "She won't wake" and walks toward Harry. When Harry says "Tom. Tom Riddle," the shot faces Harry and Ginny, and Harry's wand is lying on the open ground below the sole of Ginny's shoe. When Harry asks "Are you a ghost?" as the camera pans closer to Harry, his wand is conspicuously in a different place now, it is lying partially hidden under Ginny's robe above her right foot, right next to Harry. In the next shot after Riddle says, "A memory. Preserved...," the wand is gone from the previous shot's position. (Visible on DVD fullscreen.)
Visible crew/equipment: In his study, Dumbledore speaks to Lucius Malfoy and holds up the skewered diary for Malfoy to see. When Dumbledore puts the diary down in this shot as Dobby tugs on Harry's sleeve the moving black wire between Dobby and Malfoy on Dobby's left is visible on the bottom of the screen. This wire was attached to Harry's sleeve to make it move and though the wire between Dobby and Harry was edited out, the other end was not. (Visible on fullscreen DVD.)
Visible crew/equipment: After Lee announces, "Harry Potter has caught the Snitch. Gryffindor wins!" there is a shot of the falling Bludger. In the next two close-ups of Harry as he avoids the Bludger and looks up, multiple head studio lighting, used to mimic daylight on his features, is very clearly reflected in BOTH lenses of his glasses. In the opening shot of the ongoing Quidditch match, the entire pitch is visible and it is void of any lights.
Visible crew/equipment: Ron and Harry hide under the invisibility cloak in Hagrid's hut. After Lucius Malfoy enters he starts to walk towards the invisible boys and they nervously back up. As they back up, something large comes up from the bottom of the screen in front of the boys then quickly goes back down. The boys do NOT hold anything when they go under the cloak and they do not hold anything when they come out. (Visible on fullscreen DVD.)
Continuity mistake: When Harry escapes into the Ford Anglia, in the interior shot Ron grabs firm hold of Harry under his left arm, while Vernon pulls on Harry's foot. In the overhead exterior shot Ron's arm holds Harry above his arm, yet in the next close-up of Harry, Ron's arm is under Harry's. Then just after Ron yells, "Drive!" Ron's arm is over Harry's arm once again.
Revealing mistake: Throughout the Quidditch match, Harry's right arm guard is visible. At the top, over his elbow, there is an attached strip of leather that is tied securely around his arm and the three short straps are snugly buckled around his forearm. However, as the Bludger approaches just before breaking his arm, the ties on the strip of leather are GONE, though visibly tucked up in the close-up and the buckled straps are considerably LONGER, deliberately causing the arm guard to be very loose. The position of the arm guard differs in the two close-ups as well.
Continuity mistake: When Harry is in Borgin & Burkes in Knockturn Alley, he approaches the glass dome with skulls sitting on the shelf and to the right is a large round mirror sitting atop a cabinet. When he walks away after freeing his hand from The Hand of Glory, in this wide shot there is now a very tall, ornate, wrought iron fixture behind him that stands beside the shelf, in front of the round mirror and cabinet, that was not in that previous shot.