Factual error: On page 25, it mentions that the boa constrictor at the zoo winked at Harry. Snakes don't have eyelids at all, so it's impossible for them to wink. Submitted by Issabee

Other: When Harry tells Uncle Vernon and Aunt Petunia about Platform 9 3/4, the pair stare at him in confusion. While she pretends it doesn't, Petunia knows the platform exists; her sister Lily went to Hogwarts, as well. And according to flashbacks from Deathly Hallows, Petunia once even managed to get onto the platform with her parents to see Lily off. Submitted by Cubs Fan

Continuity: Harry buys the book "One Thousand Magical Herbs and Fungi", but later, he looks up "dittany" in "One Hundred Magical Herbs and Fungi". The title changes.

Continuity: While being sorted into houses, Harry looks up at the Sorting Stool, and there are only three people left to be sorted. Professor McGonagall then calls out the names of four more kids.

Other: In Harry's Hogwarts letter it says students may bring a cat, an owl or a toad, yet Ron is allowed to bring a rat.