I love it when I find inconsistencies in the books!

Maybe I love it because it makes me feel smart. Here are a couple I've found by listening to the books.

In the second book, Ginny has "bright, green eyes." In the seventh, they are the same color as Mrs. Weasley's eyes.

In one of the early books, I think it's the third, one of the players on the Gryffindor's Quidditch team is Katie Boyle. In later books, she's Katie Bell. I haven't checked the printed version, so that could be the narrator's error.

So, what have you found? With seven books, I'm sure these can't be the only two.