Description of problem: I disabled the firewall during firstboot and saw this error (see screenshot). Also encountered it using the wizzard to create new rules. Version-Release number of selected component (if applicable): system-config-firewall-1.0.8-1.fc8
Created attachment 229051 [details] error message
Please update iptables to version 1.3.8-5 from rawhide and try again.
running latest rawhide everything, things look good now. closing.