HARRY POTTER AND THE BREACHED SPOILER EMBARGO?While I'm not going to risk becoming the star of a new book entitled "Steve Brandon and the Lawyers of Bloomsbury Publishing PLC" by posting allegedly leaked excerpts from Harry Potter and the Half-Blood Prince, RottenTomatoes.com forum poster Lord Sidious has posted a spoileriffic photo that is allegedly of the bottom two-thirds of page 606 from one of the leaked copies of Harry Potter and the Half-Blood Prince, and, if it's not fake, it contains a major, major plot twist.
Is it real? Hard to say: I noticed that the surname of one of the characters seems to have the last two letters inversed, so it might just be a very skilled Photoshop where the guy doing the Photoshop somehow failed to notice a typo. Or it may be legit, and the "typo" I saw could just be because it's a low-resolution jpeg, so the two letters are kind of fuzzy.
If you want to be further spoiled (allegedly), see the first post in the thread for the quick n' dirty as well as chapter titles.
Will that thread stay up for much longer? I doubt it.
Also, I've been looking for other allegedly-leaked spoilers and they're pretty hard to find, but I did find this list of many major alleged spoilers on Usenet using Google Groups, though one major part of the twist from the alleged screenshot of page 606 is not mentioned in this list.