[libvirt] network filters not working at all in 0.9.2

[xxyton]

Hi there,

is just upgraded to libvirt 0.9.2 and restarted my domains but now all
network filters are gone.
Why does libvirt not set iptables configuration while filterref clause
exists?
Is this a known bug? How can I fix it.
Restarting / redefining doesn't output any errors.

Example config XML of domain:
...
      <filterref filter='clean-traffic'>
        <parameter name='IP' value='192.168.2.34'/>
      </filterref>
...

# virsh -v
0.9.2

# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     udp  --  anywhere             anywhere            udp dpt:domain
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:domain
ACCEPT     udp  --  anywhere             anywhere            udp dpt:bootps
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:bootps

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  anywhere             192.168.122.0/24    state
RELATED,ESTABLISHED
ACCEPT     all  --  192.168.122.0/24     anywhere
ACCEPT     all  --  anywhere             anywhere
REJECT     all  --  anywhere             anywhere            reject-with
icmp-port-unreachable
REJECT     all  --  anywhere             anywhere            reject-with
icmp-port-unreachable

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
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