[Dovecot] expire-tool and userdb returned mail location

[Tapio Sokura]

Hello,

I'm having problems with expire-tool in Dovecot 1.2.6 not finding the 
mailboxes. I had

mail_location = 
mbox:/var/spool/dovecotmail/%d/%n/mails:INDEX=/var/spool/dovecotmail/%d/%n/indexes

in dovecot.conf, but that doesn't work with expire-tool. So I commented 
that out from dovecot.conf, all the data is in a database anyway. A 
userdb lookup returns the following for userid at domain:

home = /var/spool/dovecotmail/domain/userid/
mail = 
mbox:/var/spool/dovecotmail/domain/userid/mails:INDEX=/var/spool/dovecotmail/domain/userid/indexes

Now when running expire-tool --test, I get this:

Error: Namespace '': Mail storage autodetection failed with 
home=/var/spool/dovecotmail/domain/userid/
Info: User lookup failed: userid at domain

When I run expire-tool under strace, I can see that it is indeed looking 
for the mails in the typical autodetect locations (Maildir, mail, Mail) 
under user's home directory. So it appers that expire-tool takes the 
home directory from userdb, but ignores mail location returned by userdb?

   Tapio