dpkg-reconfigure dovecot-common can't regenerate ssl certs

[Wolfgang Pauli]

Hi,

My ssl certs expired a couple of days so I wanted to regenerate them, 

backed up the old ones in ssl/certs and ssl/private and ran the reconfigure , 
but I got this:

Setting up dovecot-common (1.0.rc17-1ubuntu2) ...
[: 59: /etc/ssl/certs/dovecot.pem: unexpected operator
Creating generic self-signed 
certificate:  /etc/ssl/certs/ssl-cert-snakeoil.pem
 /etc/ssl/certs/dovecot.pem
(replace with hand-crafted or authorized one if needed).
Warning : Bad SSL config, can't generate certificate
chgrp: invalid group `dovecot'
chgrp: invalid group `dovecot'
Starting mail server: dovecot.

Any ideas???

Thanks,

Wolfgang