[Dovecot] Authentication failed (migrate from 2.0.13 to 2.0.17)

[Dovecot user]

i just get this error :
dovecot: imap-login: Aborted login (auth
failed, 1 attempts): method=DIGEST-MD5, rip=127.0.0.1, lip=127.0.0.1,
secured
root at mx:/var/log # date 

IMAP Error: Login failed for
testing at mydomain.net from 192.168.0.92. Authentication failed. in
/var/www/webmail/roundcubemail-0.7.2/program/include/rcube_imap.php on
line 205 (POST /webmail/?_task=login&_action=login)

On 03.07.2012
09:20, Timo Sirainen wrote: 

> On 3.7.2012, at 8.00, Dovecot user
wrote:
> 
>> I tried to do the same 'dovecot -n' (dovecot 2.0.13, same
config file) :
> 
> Oh, are you saying that the difference isn't just
the Dovecot version, but that they are completely different systems with
(somewhat) different settings also? That's much more likely the problem
than the version number.
> 
>> Is it normal that there are no lines :
"default_internal_user = _dovecot" & "default_login_user = _dovenull"
>

> Normal enough. It's then using the Dovecot's defaults which are
"dovecot" and "dovenull".