[Dovecot] index file corruption

Hello everyone. I am new to the list, so forgive me if this has been discussed already.

My configuration is as follows:

Fedora Core 3, fully patched through yum through today. Dovecot 0.9.9.13 Postfix 2.1.5 Using Maildir with Mail stored in ~/Maildir

My issue is that, for some odd reason the inbox file index gets corrupt, There is no rhyme or reason as to why it happens or when, but a simple rm -rf ~/Maildir/.INBOX fixes everything (I assume because Dovecot rebuilds the index file.)

Has anyone else on the list seen this? Is there some workaround for it?

Andy