I've been on a mutt tear - fixed a zillion little network bugs and worked on concurrent access to the same IMAP folder. Now

• it doesn't seem to crash
• if you change message flags in one session they get picked up automatically in the others

I don't know how many people will notice unless they're playing around, but it looks cool.

I've gotten almost all the features in that I want for 1.4 (still want to make authentication method configurable), after that it's pure bug-hunting. I think.