The monastery, Bellatrix, and Dementor!Harry evidences of Voldemort's violent behavior cited above are original creations in HPMOR. HPMOR doesn't just ignore canon!Voldemort's punishment fixation; it reaffirms it.
There should be a reason.
Quirrell had older students beat up Voldemort's enemy during class. He squashed a reporter who mildly annoyed him, cast the Killing Curse at an Auror and probably arranged to put Hermione in danger of Azkaban.
Now if Voldemort were supposed to be stupid, this would still represent a change. But all of his most competent opponents say the opposite, that he seemed frighteningly intelligent. And all the old instances of violence, IIRC, served a forward-thinking purpose in addition to hurting people. (At least if you accept my interpretation of the way he treated Bella.)
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: