JA> Since upgrading to 2.4.22-21mdk from stock 9.2 kernel I have had cyrus-imapd
JA> stop multiple times, and require a database recovery before it would accept
JA> new mail. This was working fine for months on end with 9.1, and the
JA> 2.4.22.10mdk kernel with no problems.
Are there any errors in the logs ?
JA> Anyone seen similar issues, or have any possible ideas what could be causing
JA> this?
Maybe this has nothing to do with kernel, most probably the problem is
with some other updated package. I had a similar issue a while ago
with 8.2 but it turned out to be a problem with a bad memory.