Why does Hogwarts have modern (muggle) toilets? I know that it is a main focal point for the plot, but if the school is really as old as they say, it surely wasn't built with them. They must have had some magical method of waste disposal (the 'scurgify' spell), and surely a way to create water, so why resort to installing plumbing and a (supposedly inefficient) muggle technology. They don't use electricity, Television, Internet, etc., so why plumbing? [Even if they don't use Muggle technology, not having indoor plumbing would be a hassle. They also use Muggle sinks. It's also a major plot point that the Basilisk travels through the school using the plumbing.]

When we see Ginny lying in the chamber of secrets and again once she has awoken she has bare legs or flesh coloured tights on. However as they fly out of the chamber, Ginny is now wearing black tights. [Ginny does not wear flesh coloured tights while in the chamber, nor does she wear black tights on her way out. Ginny wears dark grey knee high socks both in the chamber and when she hangs onto Harry's waist as Fawkes carries them all out.]

When Harry and Tom Riddle are talking right after Fawkes claws out the basilisks eyes Tom says "Your Phoenix may have blinded the basilisk but it can still hear you." But in reality snakes can't hear, and the basilisk is just a big snake. [The Basilisk is not "just a big snake" - far from it. This King of Serpents may live many hundreds of years, was born from a chicken's egg, and hatched beneath a toad. Anyone who looks into its eyes suffer instant death. I should think that if a Basilisk has the ability to hear, however it does, that should be the least of its believability factors.]

The basilisk is supposed to be moving through the plumbing, but when it petrifies people it's in a room or hallway. How does it get out of the plumbing and into the room? It's too big to fit through a tap, drain or toilet. If it has to knock a hole in the pipes and walls to get out, surely someone would have noticed gaping holes everywhere? [It is a magical beast controlled by the 2nd most powerful wizard in the world. Maybe Voldemort shrunk it before he sent it out to hunt.]

Look at the blood writing on the wall. Tom Riddle says that it was written by Ginny, but you can see that it's too high for her to write - we see a flashback of Ginny writing the blood on the wall, not standing on a chair and clearly not standing on a ladder. [If a wizard or a witch can levitate a feather, it would be no problem to levitate him/herself. Besides, the shot of Ginny writing just shows her from the chest up writing on the wall.]

In the scene where Ron & Harry notice the hallway to the girl's bathroom has been flooded, there is a depth of one inch or so of water in the hallway. When the boys step into the bathroom there is water on that floor as well, due to all the sinks overflowing with water and all the faucets turned on fully. But if you notice, there are drain grates surrounding the base of the washroom sinks extending a good 2 feet or more. There is no water coming out of these grates, indicating that the overflow hasn't reached capacity yet. If the grating is higher than the surrounding floor, and no water is exiting the grating, then it's impossible to flood the hallway. If the grating is lower than the flooded hallway, it's also impossible for the flooded section to not flow back to lower ground, namely the lower section of grating underneath the sinks. [The washroom hasn't been used in a long time because of the haunting. The drains are probably clogged, which means they would just fill up and no water would visibly come out of them.]

When Harry and Ron are in Slytherin dungeon as Crabbe and Goyle, Ron says "Scar," and Harry responds with "Hair," but it is a split second before Ron's hair turns red. [The fact that it starts to change color more vigourously after Harry says that doesn't mean that he couldn't have seen the first signs of the hair colour change before he spoke.]

When Harry is talking to Dobby about his family; Harry is sitting on the bed and Dobby on the stall. Harry's shadow is correctly placed because he was there when filming, However Dobby's shadow (because he was computer created) is not. As Dobby is behind the lamp should his shadow be on the floor to the right of the stall? We can see it on the wall next to Harry's. [Dobby's shadow is on the wall next to Harry's because there's a lamp on the tall chest of drawers behind him (also the source for Harry's shadow). You see this other lamp as soon as Dobby stands on the table. You also saw it in a scene a few moments earlier when Dobby was head butting the chest of drawers.]

After Lucius Malfoy leaves Dumbledore's office, Harry asks Dumbledore for the diary, takes off his shoe, puts the sock in the diary, put his shoe back on, ties it, and comes out of Dumbledore's office. Malfoy should have already left the building, but is only part way down the corridor. [It is quite possible that Harry did these actions quickly and he could have simply slipped his foot out and back into his shoe without untying the lace. The winding stairwell is just outside Dumbledore's study and since Lucius Malfoy is not walking quickly, it is perfectly feasible for Harry to have caught up with him. ]

In the girls bathroom, Mourning Myrtle tells Harry how she died by seeing the snake's eyes by the sink. How would she have died if she was wearing glasses? She would've only been "petrified". [Not true. All people who only were "petrified" saw the basilisk in a reflection, not only through glass (Hermione in the mirror, the cat in the water on the floor, Colin through his reflex camera). Glasses alone don't seem to be enough as a protection.] [Actually, Justin didn't see a reflection, he saw the basalisk through Nearly Headless Nick. The difference is that looking through a ghost will distort the image, but glasses are specifically designed to make the image more clearly.]

During the scene in Transfiguration classroom, the students' positions in the class are constantly changing - for example, there is a blond girl sitting in the middle of the class in one shot, then in another she is back in a corner. [This is not true. The students sit in the very same seats, whether in a front, back or side shot. Different girls are being confused as one girl.]

At the end of the film, Dumbledore says that "all exams have been cancelled". What about pupils taking their final exams in 5th and 7th year? [The exams would have been taken at a later date.]

When the Ford Anglia drives away after ejecting Ron and Harry, the boot (trunk) of the car is open. The boot remains open as the boys chase the car. Yet, as the car passes Hagrid's cabin, the boot is closed. [When Harry and Ron chase the car, there is a shot in between the 'trunk open' shot and the 'trunk closed' shot and it's when Ron says, "Dad's gonna kill me." In that time the car could very easily close its own trunk just as it closes and opens its own doors, etc.]

When Harry and Ron are talking through the bars that are over Harry's window, there is no glass in the window. When the car pulls the bars off of the wall, the window magically has glass in it and shatters even though Vernon screwed the bars into the WALL. [Vernon attaches the screws of the security bar into the black window frame, NOT the brick wall. Later, when Ron and Harry are speaking some gleam can be seen within some of the diamond patterns, proving that there is a glass pane.]

There were a hole in the back of the car, the engine cover was squished and the windshield and doors was smashed after the Whomping Willow attack. But in the scene where Harry and Ron find the car in the forest, almost all the damage has disappeared. [Damage appearing and disappearing, whether right away or in the Dark Forest, is already noted in several mistakes.]

When Harry & Ron are driving on the train track, when Ron says 'We can't be far behind,' you can see shadows of equipment towards the left of the screen. [When viewed in both wide screen and full screen, when Ron says, "We can't be far behind." there is NO shadow whatsoever of any equipment anywhere in this shot.]

When Harry is hanging from the Ford Anglia, his window is open. When he gets back in, it is wound up. [In this shot as Harry remarks that he thinks they found the train, the window directly to Harry's left IS indeed rolled down, note the specks are on the front window pane. The window you may confused with is the one to Harry's left, directly behind him. In the last shot of the car as its headlights are turned on, the window is closed, but we do not know how much time has elapsed since the previous shot.]

In the two inside shots of the flying car when Harry says 'Most muggles aren't accustomed to seeing a flying car,' and Ron says 'Right,' the sky outside seems to be quite overcast. In the next of them disappearing it is sunny. [When Ron says, "Right." in the next shot looking out the front window there is blue sky and light white clouds in front of them at the horizon. First as the car lifts off the ground and then later as the car disappears there is blue sky and puffier white clouds higher up in the sky, but if you look down towards the horizon in both of those shots the clouds are lighter just as in the shots of the boys in the car.]

When the train station manager asks Harry and Ron what they're doing when they crash, he is holding a reading book. In the next shot of him, he quickly pulls it out of shot, but it is now a scrapbook. [That is so wrong. It is the exact same book that is visible in the three shots of him, even as he walks away from the boys shaking his head.]

When Dobby is hitting his head on the drawer, it shows Uncle Vernon pouring Mrs. Mason a drink, then he says 'Don't mind that it's just the cat'. It then goes back to Dobby, and the stool he is about to sit on to tell Harry not to go to school changes positions considerably from the last shot. [The only thing that changes is the angle of the camera and the stool is in the same position in both of these shots. Even if it were in a bit of a different position, in the time between the two shots of Dobby there are other shots including four shots of Vernon and the Masons, so if Dobby would have say kicked the stool in his hysteria it would be a very plausible reason.]