Corrected entry: 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.
Corrected entry: 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. (00:04:25)
Corrected entry: 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. (02:24:10)
Corrected entry: 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. (00:48:15 - 00:49:20)
Corrected entry: 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.
Corrected entry: When Dobby puts the stack of letters in his 'mark of enslavement' He pulls it back, and it disappears. From the way he did this, he would not have been able to put it in his 'mark of enslavement.'