[Users] IP6 Tables in templates

[Dave Lawrence]

Any idea why some of the templates (eg Ubuntu 11.10) at
http://wiki.openvz.org/Download/template/precreated

have ip6tables binaries included and other do not (eg Centos 6).

Is ip6tables expected to work correctly in a CT?  I don't see any
documentation regarding the CT conf files but can I assume that if I copy
IPTABLES="ip_tables iptable_nat ip_conntrack ....
to
IP6TABLES="ip6_tables ip6_conntrack ....
will that syntax work?

because if I try
IP6TABLES="nonsense"
vzcfgvalidate does not throw any errors.

Thanks!
Dave