nova-client never return when removing floating ip

When I run "nova remove-floating-ip <id> <ip>" the command never returns, but it still succeed in actually removing the IP. When the command is interrupted by ctrl+c it prints a traceback

nova remove-floating-ip 142 192.168.10.132
^CTraceback (most recent call last):
  File "/usr/bin/nova", line 9, in <module>
    load_entry_point('python-novaclient==2012.1', 'console_scripts', 'nova')()
  File "/usr/lib/python2.7/dist-packages/novaclient/shell.py", line 353, in main
    OpenStackComputeShell().main(sys.argv[1:])
  File "/usr/lib/python2.7/dist-packages/novaclient/shell.py", line 304, in main
    args.func(self.cs, args)
  File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/shell.py", line 982, in do_remove_floating_ip
    server.remove_floating_ip(args.address)
  File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/servers.py", line 80, in remove_floating_ip
    self.manager.remove_floating_ip(self, address)
  File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/servers.py", line 287, in remove_floating_ip
    self._action('removeFloatingIp', server, {'address': address})
  File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/servers.py", line 538, in _action
    return self.api.client.post(url, body={action: info})
  File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 133, in post
    return self._cs_request(url, 'POST', **kwargs)
  File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 118, in _cs_request
    **kwargs)
  File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 88, in request
    resp, body = super(HTTPClient, self).request(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/httplib2/__init__.py", line 1444, in request
    (response, content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)
  File "/usr/lib/python2.7/dist-packages/httplib2/__init__.py", line 1196, in _request
    (response, content) = self._conn_request(conn, request_uri, method, body, headers)
  File "/usr/lib/python2.7/dist-packages/httplib2/__init__.py", line 1166, in _conn_request
    response = conn.getresponse()
  File "/usr/lib/python2.7/httplib.py", line 1027, in getresponse
    response.begin()
  File "/usr/lib/python2.7/httplib.py", line 407, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python2.7/httplib.py", line 365, in _read_status
    line = self.fp.readline()
  File "/usr/lib/python2.7/socket.py", line 430, in readline
    data = recv(1)
KeyboardInterrupt

Running Diablo 2011.3.1, with one controller, and three compute nodes. Multi_host and Vlan networking.