In case anyone is interested in reading (and maybe helping!) with a dsync redesign that's intended to fix all of its current problems, here are some possibly incoherent ramblings about it:
http://dovecot.org/tmp/dsync-redesign.txt and even if you don't understand that, here's another document disguising as an algorithm class problem :) If anyone has thoughts on how to solve it, would be great: http://dovecot.org/tmp/dsync-redesign-problem.txt It only deals with saving new messages, not expunges/flag changes/etc, but those should be much simpler.
