[Dovecot] dovecot upgrade problems

[corpus.defero]

On Wed, 2010-04-07 at 12:08 +0200, Cieslak, Andreas wrote:

AFAIR Dovecot does not create that socket:
> /var/run/dovecot/auth-master
Some other program creates it - so either tell that other program to
create the socket where you want it now, or tell Dovecot where that
socket actually is.

I can't say for sure that is your error, but if the socket is not where
Dovecot is looking, it's going to complain about an auth issue. Also, I
would be surprised if the new version will start, if you already have an
old version running - sanity would say that is a bad thing to try and
do.