Mistakes in HP1

[Historyismypas…]

does anyone remember any of the mistakes in the HP series esp book 1?  

[RHWright]

What to you mean by "mistakes"?

Are we talking simple printing errors and other errata?

Infidelity with "real world" facts?

Or descriptions/statements/occurrences that are later ignored or contradicted by other parts of in-series continuity?

[Historyismypas…]

What I meant was--"Or descriptions/statements/occurrences that are later ignored or contradicted by other parts of in-series continuity?"

[wisdombunny]

What kind of mistakes ?

[B00K_L0VER]

This is not in Harry Potter and the Sorceror's Stone.

In Book5, when Hagrid has the dragon steak over his eye, Harry describes a drop of green blood on the steak.  Then, in Book 6,  Professor what-his-name (not Dumbledore, Proffesor Slughorn)  says the blood on his walls is dragon's blood, even though JK described the blood on the walls as red.

There are some others, but I can't think of them right now.