[Dovecot] Corrupted index cache file

[Wink Saville]

Hello,

I'm running:

   root at ubuntu-mail:/var/log# dovecot --version
   1.0.beta3

   root at ubuntu-mail:/var/log# uname -a
   Linux ubuntu-mail 2.6.15-25-386 #1 PREEMPT Wed Jun 14 11:25:49 UTC 
2006 i686 GNU/Linux

I'm seeing the following in the mail.err file when I access a IMAP folder:

  Jul 30 10:19:16 localhost dovecot: imap(wink): Corrupted index cache 
file /home/wink/Maildir/dovecot.index.cache: Duplicated field in header: 
hdr.LIST-ID

What can I do to fix this?

Regards,

Wink