Hermione, the girl who publicly humiliated Draco and the whole Pureblood cause, now owes a blood debt to Lucius Malfoy.
The dictionary attack by H&C on Hermione happened before Hermione defeated Draco. (edit: sorry, not months before, but still before.) Back then there was no reason for Lucius to target her or even publicly notice her existence.
Edited to add: in fact, the attack was immediately after Hermione had been made to stop her anti-bullying campaign and publicly punished and humiliated - partially making up for any offense she caused Slytherin up to that point.
The dictionary attack by H&C on Hermione happened months before Hermione defeated Draco.
The attack depicted in Ch. 77 was clearly recent, after the events of the SA sequence.
EDIT: New discussion thread here.
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. With two chapters recently the previous thread has very quickly reached 500 comments. The latest chapter as of 17th March 2012 is Ch. 79.
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.
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: