This happened to the wu-imap server my employer was using at the time since they were running the maildir patches: http://www.davideous.com/imap-maildir/#updat

This happened to the wu-imap server my employer was using at the time since they were running the maildir patches: http://www.davideous.com/imap-maildir/#updates http://www.davideous.com/imap-maildir/#updates The sort function couldn't handle the rollover so when we came in that day all our mailboxes had their email sorted in the wrong order, and it couldn't be fixed without the listed patch.