l3-agent error

2013-08-27 19:08:07    ERROR [quantum.agent.l3_agent] Failed synchronizing routers
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/quantum/agent/l3_agent.py", line 639, in _sync_routers_task
    self._process_routers(routers, all_routers=True)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/l3_agent.py", line 622, in _process_routers
    self.process_router(ri)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/l3_agent.py", line 330, in process_router
    self.routes_updated(ri)
  File "/usr/lib/python2.7/dist-packages/quantum/agent/l3_agent.py", line 662, in routes_updated
    new_routes = ri.router['routes']
KeyError: 'routes'