[Dovecot] dovecot 2.0.13 fd_send(imap, 15) failed, dovecot 1.2.16 fd_send(10) failed

[Spod Letela]

Hi, I am reinstalling my server and i have encoutered a strange problem,
both dovecot 2.0.13 and 1.2.16 are
reporting me a problem with fd_send Invalid argument on imap login. I am
running dragonfly bsd 2.10.1., compiled
dovecot from pkgsrc.

Can someone help me out or at least point me in some direction, i am a bit
lost... :(
Aug 15 10:01:00 master: Info: Dovecot v2.0.13 starting up
Aug 15 10:01:10 auth: Debug: Loading modules from directory:
/usr/pkg/lib/dovecot/auth
Aug 15 10:01:10 auth: Debug: auth client connected (pid=1206)
Aug 15 10:01:10 auth: Debug: client in: AUTH    1       PLAIN
service=imap    secured lip=127.0.0.1   rip=127.0.0.1   lport=143
rport=1032      resp=x
Aug 15 10:01:10 auth: Debug: Loading modules from directory:
/usr/pkg/lib/dovecot/auth
Aug 15 10:01:10 auth: Debug: passwd(y,127.0.0.1): lookup
Aug 15 10:01:10 auth: Debug: client out: OK     1       user=y
Aug 15 10:01:10 imap-login: Error: fd_send(imap, 15) failed: Invalid
argument
Aug 15 10:01:10 auth: Debug: client in: CANCEL  1
Aug 15 10:01:10 imap-login: Info: Internal login failure (pid=1206 id=1)
(auth failed, 1 attempts): user=<y>, method=PLAIN, rip=127.0.0.1,
lip=127.0.0.1, secured
Aug 15 11:01:27 master: Warning: Killed with signal 15 (by pid=0 uid=0
code=kill)

Aug 16 01:55:45 dovecot: Info: Dovecot v1.2.16 starting up
Aug 16 01:56:35 imap-login: Fatal: fd_send(10) failed: Invalid argument
Aug 16 08:22:29 dovecot: Warning: Killed with signal 15 (by pid=0 uid=0
code=kill)
Aug 16 08:22:31 dovecot: Info: Dovecot v1.2.16 starting up
Aug 16 08:22:48 imap-login: Fatal: fd_send(10) failed: Invalid argument