slapd hangs on startup from unclean shutdown

I'm running openldap 2.3.43 on a Fedora 9 Linux x64-bit system. I've had to hard reboot this system a few times without cleanly shutting it down. upon startup, most of the time slapd hangs when trying to start due to not shutting down cleanly. The only way to get it going again is to go into single user mode, delete everything in /var/lib/ldap and then loading a nightly backup.ldif with slapadd. Is are there any settings/configuration changes I can make to slapd to have it start up from unclean shutdowns?