[Dovecot] /var/run/dovecot folder gets deleted on server reboot? ubuntu 10.10

[jacques]

Hi
After rebooting my server connections to the mail system set up there
failed - on closer inspection no dovecot process was running or got
started.
When running as root /usr/share/sbin/dovecot -c
/etc/dovecot/dovecot.conf got error on console
/var/run/dovecot/auth-master could not be opened and found no
/var/run/dovecot folder!.
Is there better script to place in /etc/init.c/ to start dovecot (which
will not fail silently?) Any idea what would remove the folder on ubuntu
10.10, running dovecot 2.1.5 and postfix 2.1.7?

Any suggestions?

Jacques