[Dovecot] "Corrupted index cache file" error (Dovecot 1.0.3)

[Mike Brudenell]

Greetings -

Now that users are beginning to pile up more on our new Dovecot-based  
IMAP service I'm seeing a small number of entries like this in the  
logfiles:

Corrupted index cache file /mailstore/index/o/ozw100/.INBOX/ 
dovecot.index.cache
: invalid record size

We are using Dovecot 1.0.3 with Maildir folders served over NFS from  
NetApp filers, but the index files are stored on local disk.

By "a small number" I mean 4 or 5 on each of our two IMAP servers  
since midnight.

   * Should I be worried?
   * Is there anything I need to do fix the files?  (I'm guessing not  
as no
     problem reports have come in, and the logs show the people affected
     continuing to work throughout the day.)
   * Would upgrading to 1.0.5 help?  (I couldn't see anything in the
     Release Notes for either 1.0.4 or 1.0.5 about this)

Cheers,
Mike B-)

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