He was a jerk in Po A toward Hermione regarding the Firebolt and Scabbers''s disappearance.He was a jerk in Go F toward Harry when his name came out of the goblet, and toward Hermione at the Yule Ball.
Another German version of 'Harry Mc Gonagall' is being posted at Rikee A Spanish version of 'Harry Mc Gonagall' is being posted here by Lord Zanator.
A French version of 'Harry Mc Gonagall' is being posted here by Pourfendeuse.
That means he probably spent the whole summer practicing the curse - probably on muggle girls.
There's no way he could've been that good at the curse on his first try.
I've been a Harry Potter fan since late 2004, and started writing fan fiction at the beginning of 2006.
Many of my stories were started (and many completed) before Harry Potter and the Deathly Hallows came out, so they don't account for all the information from that novel, so please don't try to inform my of those type of errors as I prefer to leave my stories as is (No offence intended).
Then again, I'm sure Dumbledore didn't ask Snape's victims questions like that, either.
My main point is that Dumbledore had promised the wizarding world that Hogwarts would be safe during HBP, but he was purposely letting a lawbreaker run free on the odd chance that he'd develop a conscience, making Draco's life more important than Rosemerta's, Katie Bell's, Ron Weasley's, and every other student at Hogwarts' lives.
Dumbledore was an accessory to every one of Draco's crimes in HBP by knowingly letting him - a marked Death Eater - come to Hogwarts at all.