Just thought I'd post the caveats I had installing on FC5. On a fresh FC5 box I was able to get the zcs-3.1.2_GA_445.FC4.tgz install to work by doing the following:
1. In /opt/zimbra/openldap-2.3.21/etc/openldap/slapd.conf change the line:
loglevel 4 #or whatever level you want the logging to be at
2. Secondly, in /opt/zimbra/conf/ca/ca.pem change the lines:
-----BEGIN TRUSTED CERTIFICATE-----
-----END TRUSTED CERTIFICATE-----
After that, rerun the /opt/zimbra/libexec/zmsetup.pl script and you should be good to go.