libvirt fails to start lxc containers

Unable to complete install: 'internal error guest failed to start: 2012-01-24 15:03:43.383+0000: 22039: info : libvirt version: 0.9.8
2012-01-24 15:03:43.383+0000: 22039: warning : lxcCapsInit:77 : Failed to get host power management capabilities
2012-01-24 15:03:43.429+0000: 22040: info : libvirt version: 0.9.8
2012-01-24 15:03:43.429+0000: 22040: error : lxcControllerRun:1393 : unsupported configuration: Expected exactly one TTY fd
'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 44, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/create.py", line 1899, in do_install
    guest.start_install(False, meter=meter)
  File "/usr/lib/python2.7/dist-packages/virtinst/Guest.py", line 1223, in start_install
    noboot)
  File "/usr/lib/python2.7/dist-packages/virtinst/Guest.py", line 1291, in _create_guest
    dom = self.conn.createLinux(start_xml or final_xml, 0)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2166, in createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self)
libvirtError: internal error guest failed to start: 2012-01-24 15:03:43.383+0000: 22039: info : libvirt version: 0.9.8
2012-01-24 15:03:43.383+0000: 22039: warning : lxcCapsInit:77 : Failed to get host power management capabilities
2012-01-24 15:03:43.429+0000: 22040: info : libvirt version: 0.9.8
2012-01-24 15:03:43.429+0000: 22040: error : lxcControllerRun:1393 : unsupported configuration: Expected exactly one TTY fd