Timo + All, A few minutes after having some emails delivered into my mailbox I got the following messages in my maillog: May 24 03:05:27 myriad dovecot: imap(andrew): Maildir sync: UID inserted in the middle of mailbox (2 > 1, file = 1084812461.V27406I77e27.myriad.flat:2,S) May 24 03:05:27 myriad dovecot: child 81038 (imap) killed with signal 11 May 24 03:15:28 myriad dovecot: imap-login: Login: andrew [192.168.0.2] May 24 03:15:28 myriad dovecot: imap(andrew): Transaction log file /home/andrew/Maildir/.INBOX/dovecot.index.log: invalid indexid I'm only running the test releases somewhere where there is just a few mails per day at the moment, but test emails appear to be delivered without fault. I'll try -test12 which it looks like Timo has just released in case fixes in there are related. Thanks! Andrew