cyrus reconstruct not reconstructing IMAP mailbox properly

Running OS X server 10.3.9 here. I have one particular shared IMAP mailbox that has many mail files in the spool mailbox , but when the users select any of the mails in mail.app they get: "The message from concerning “” has not been downloaded from the server. You need to take this account online in order to download it." Also in Maill.app all of the mails just have date received and no from, subject fields filled in. I tried to reconstruct the mailbox in the usual way sudo -u cyrus /usr/bin/cyrus/bin/reconstruct -r -f mailboxname It does reconstruct, but same problem afterwards. Tried deleting index,cache,header. for that mailbox and reconstruct, same problem. Sir Admin shows size 0 for that mailbox. Looked at the files in the mailbox and the only difference between this mailbox's files and any other that we have is that the mail files all have a number greater than 1 for the hard links: -rw------- 4 cyrus mail Could that cause this problem and ideas how to fix it please?