[CentOS] syslog strangeness

I'm setting up a server and noticed syslog has stopped putting messages
into secure, maillog, and messages.  syslog.conf is stock, and both it
and klogd are running.  This occurred around the same time I put the
IPTables config in the box, but disabling iptables doesn't seem to make
any difference.  I'm doing things that should generate traffic to those
files.  Cron jobs have also appeared to stop running as well.

Reinstalling the box would be difficult, so any advice would be
appreciated on where to look.

Thanks