OMFG, this stuff with Daphne just gets more and more twisted! I kind of want to smack Draco - it's not worth it! It's interesting that Harry doesn't understand/can't see Draco not liking him on the potion. I would think it would make sense to him, even if he didn't agree with Draco about it.

This line, BTW, was pure genius:
“I do not ‘mess up,’” Draco said. “My plans fail with a kind of spectacular brilliance, like a star going nova, or they come off perfectly.”