Canon!Dumbledore didn't sacrifice himself to save Harry (and Draco) -- he was already dying, and he just arranged his death in such a way that Snape would be in the most trusted position possible, and the Elder Wand permanently deprived of a "true master". He failed in the latter goal.
But he was already dying because of anti-Voldemort choices he made. I'm not sure we can expect MoR!Dumbledore to make the same choices unless he sees them as a fitting end for his life (which he may not, given that he's not Harry's mentor figure).
- This thread has run its course. You will find newer threads in the discussion section.
Another discussion thread - the fourth - has reached the (arbitrary?) 500 comments threshold, so it's time for a new thread for Eliezer Yudkowsky's widely-praised Harry Potter fanfic.
Most of the paratext and fan-made resources are listed on Mr. LessWrong's author page. There is also AdeleneDawner's collection of most of the previously-published Author's Notes.
Older threads: one, two, three, four. By tag.
Newer threads are in the Discussion section, starting from Part 6.
Spoiler policy as suggested by Unnamed and approved by Eliezer, me, and at least three other upmodders:
It would also be quite sensible and welcome to continue the practice of declaring at the top of your post which chapters you are about to discuss, especially for newly-published ones, so that people who haven't yet seen them can stop reading in time.