Comment 4 for bug 968457

There may be another related problem with this. After installing RC2, I see these in the nova-network log:

2012-04-02 14:59:59 ERROR nova.rpc.amqp [req-3d2b44f3-456e-4475-93fc-1ad63ea47ad0 e5edfa94dbbc4cdc88ca50b31c4ee66b de85bc3386ff4c40\
9198228d302624f7] Exception during message handling
2012-04-02 14:59:59 TRACE nova.rpc.amqp Traceback (most recent call last):
2012-04-02 14:59:59 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/rpc/amqp.py", line 252, in _process_data
2012-04-02 14:59:59 TRACE nova.rpc.amqp rval = node_func(context=ctxt, **node_args)
2012-04-02 14:59:59 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 248, in deallocate_\
fixed_ip
2012-04-02 14:59:59 TRACE nova.rpc.amqp address)
2012-04-02 14:59:59 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/network/manager.py", line 1226, in deallocate_fixed_ip
2012-04-02 14:59:59 TRACE nova.rpc.amqp self.driver.release_dhcp(dev, address, vif['address'])
2012-04-02 14:59:59 TRACE nova.rpc.amqp TypeError: 'NoneType' object has no attribute '__getitem__'
2012-04-02 14:59:59 TRACE nova.rpc.amqp
2