My experience too, while disabling IPv6 in the modprobe.conf with an entry "alias net-pf-10 off" or "install ipv6 /bin/true" is all what's needed. The "NETWORKING_IPV6=no" in the network config file is then just cosmetic.
OK... I'll bugzilla it this weekend then.
Cheers,
-- Rodolfo J. Paiz rpaiz@xxxxxxxxxxxxxx http://www.simpaticus.com