The new thread, discussion 13, is here.
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. With three chapters recently the previous thread has very quickly reached 1000 comments. The latest chapter as of 25th March 2012 is Ch 80.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author's Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six, seven, eight, nine, ten, eleven.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it's fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that "Eliezer said X is true" unless you use rot13.
Maybe it's just an inherent constraint of writing a Harry Potter fic. If you change so many things that there aren't even prophecies anymore, and the one about Harry and Voldemort is a false one, then it's not fanfic anymore, it's a different universe with characters who happen to have the same names,
Edit: my comment was very poorly worded, based on reactions. It's not that there is a sharp division of stories into "real HP fic" and everything else. Please see my latest comment replying to replies to this one.
... Has it occurred to you that "fanfiction" and "original story" may not be sharply delineated categories? Cases in point: every major story from before the Age of Copyright, like the Greek myths or the King Arthur legends or the Robin Hood stories. Pick two versions a couple centuries apart and you'll find changes way more drastic than this one, and yet you can't pick out a version in the chain joining them that wouldn't qualify as fanfiction of the earlier versions.