mailboxes.db file minorly corrupted

[Michael Antonishek]

Recently, the following errors showed up in our Cyrus log file:

Sep 19 10:30:15 emailserver imapd[23685]: [ID 136705 local6.error] IOERROR: opening
/mail/cyrus/spool/L/user/joesmith/abuse test/cyrus.header: No such file or directory
Sep 19 10:30:27 emailserver imapd[25494]: [ID 136705 local6.error] IOERROR: opening
/mail/cyrus/spool/L/user/joesmith/abuse july/cyrus.header: No such file or directory

Upon further investigation, I found that user joesmith's mailboxes' entries for 
mail folders "abuse test" and "abuse july" were listed in the master 
mailboxes.db file, but the corresponding mailboxes that should exist for 
these folders in the mailstore were missing.

Has anyone else seen this type of problem?  

We are running Cyrus version 2.1.9.  Here are the specific details:
------------------------------------------------------------------
name       : Cyrus IMAPD
version    : v2.1.9 2002/08/30 18:40:23
vendor     : Project Cyrus
support-url: http://asg.web.cmu.edu/cyrus
os         : SunOS
os-version : 5.8
environment: Cyrus SASL 2.1.7
             Sleepycat Software: Berkeley DB 4.0.14: (November 18, 2001)
             CMU Sieve 2.2
             TCP Wrappers
             mmap = shared
             lock = fcntl
             nonblock = fcntl
             auth = unix
             idle = idled
             dirhash = full
             mboxlist.db = skiplist
             subs.db = flat
             seen.db = skiplist
             duplicate.db = db3-nosync
             tls.db = db3-nosync
------------------------------------------------------------------

Thanks,
Mike