Hi, because of problems (See thread: "IOERROR: zero index/expunge record" here on the list about 1.5 month ago) I was told to upgrade from 2.3.16 (Scientific Linux 6.1 shipped RPM) to the latest 2.4.10 version (self compiled). Yesterday night I upgraded and since this morning my phone hasn't stop ringing, because many user are getting "Mailbox has an invalid format". The log says: Aug 30 08:45:57 chromosom imap[11591]: IOERROR: refreshing index for user.muehlfeld.IMGM_Extern.GbR: Success Aug 30 08:45:57 chromosom imap[11591]: IOERROR: locking index user.muehlfeld.IMGM_Extern.GbR: Mailbox has an invalid format When I reconstruct, I get messages like: user.muehlfeld.IMGM_Extern.GbR: failed to read index header user.muehlfeld.IMGM_Extern.GbR uid 805 found - adding user.muehlfeld.IMGM_Extern.GbR uid 806 found - adding user.muehlfeld.IMGM_Extern.GbR uid 807 found - adding ... I run a recursive reconstruct on the concerned mailboxes (while no one was accessing the it). But meanwhile I had some mailboxes I had repaired about 1h ago, that already show this message again. On a few mailboxes I can't run even a reconstruct any more - I only get: fatal error: failed to mmap new message file In this case I had to remove cyrus.cache, cyrus.cache.NEW, cyrus.index, cyrus.index.NEW. The *.NEW files weren't there before I run "reconstruct". Regards, Marc ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/