I'm running gnus from git, at

  commit 803573beb3b5a5a1ee4ded1593659d9e26766897
  Author: Lars Magne Ingebrigtsen <larsi@quimbies.gnus.org>
  Date:   Sun Oct 24 06:49:30 2010 +0200

      Decode entities before prefetching images.

I noticed that I know have gcc: to a per-month sent folder.  I am
surprised that this is the default since I didn't ask for it, but that's
not important.

I have found gnus connection to my local dovecot hanging up and then
being reopened quite often.  I found this in the log after sending a
message.


Oct 25 10:11:52 gdt-server dovecot: IMAP(gdt): Panic: Trying to close mailbox Drafts with open transactions
Oct 25 10:11:52 gdt-server dovecot: dovecot: child 18451 (imap) killed with signal 6 (core not dumped - set mail_drop_priv_before_exec=yes)


I have the following perhaps-relevant non-default settings:

      (setq nnimap-need-unselect-to-notice-new-mail t)