Corrected entry: In the scene where the first years are looking at the boats, Hagrid says: "No more than four to a boat." BUT when we see Hermione in her boat, there are FIVE people in there. Four are in the normal seats, and one is leaning out at the front of the boat!
Corrected entry: The promotional photos show Harry Potter with a scar on his forehead over his right eye. On the covers of all the books, the scar is clearly shown to be over his left eye. This is to correct the mistake about the scar being in the wrong location on Harry's head.
Correction: JK Rowling has commented on this and said that in the text of the books, the scar's location is never indicated (only that it's on his forehead somewhere) and it was the novel's artist who decided that it should be centered (see the 4th book cover for the best view). The movie people decided to make it off-centre, and Rowling was fine with that.
Corrected entry: It the begining of Harry Potter, there is a sequence when Harry's mother is being killed. When we see Harry, he is wearing a Blue's Clues romper suit - I do not recall Blue's Clues being around 12 or so years ago.
Correction: The pajamas baby Harry is wearing are not Blue's Clues. It's a blue bunny on the sleeves.
Corrected entry: In the sorting ceremony, we see Susan Bones, the girl with long curly hair, was sorted into Hufflepuff House. Later, in Professor Snape's Potion class, we see Susan was sitting behind Harry when Snape questions him. Only Gryffindor and Slytherin are attending in that class together - Susan was in the wrong class!
Correction: It is never said in the movie that only Gryffindor and Slytherin have potions together. There are Ravenclaws in the class too.
Corrected entry: In the scene in the Great Hall where Ron is looking at his Chocolate Frogs cards, Harry picks one up. It's suppose to be Dumbledore's card, but in several shots you see where Dumbledore's picture should be. Instead, all you see is the green screen attached to the cards.
Correction: Dumbledore's picture was a simple holographic foil image; the same kind you'd see on any credit card. There was no green screen effect needed for this. What you're seeing is just the way the light plays off the foil when viewed from an extreme angle.
Correction: Hagrid never said only four could be in a boat in the movie. That was in the book.