PINGUS MAXIMA!
Thanks for the heads up!
I knew Snape was bad, but I never saw that coming.
Did anyone else catch on page 485 when Slughorn says (paraphrased), "I'm sorry about your friend Rupert" when he was talking about Ron? I thought he was just being absent minded and Harry would correct him, but he didn't. So I have to think it's an editing error, especially consider the ACTOR who plays Ron is named Rupert Grint.