Description of problem:
After one guest was shut down, libvirt crashes. See messages below.

Version-Release number of selected component (if applicable):
libvirt-0.7.4-1.fc12.i686

How reproducible:
once

Steps to Reproduce:
I don't know, if it's reproducible, but may be log help to fix problem.
  
Actual results:
Dec 11 11:52:30 work libvirtd: 11:52:30.536: error : interfaceNumOfInterfaces:18
7 : internal error failed to get number of interfaces on host (netcf: unspecifie
d error - errors in loading some config files)
Dec 11 11:52:30 work libvirtd: 11:52:30.595: error : interfaceNumOfDefinedInterf
aces:229 : internal error failed to get number of defined interfaces on host (ne
tcf: unspecified error - errors in loading some config files)
Dec 11 11:52:30 work libvirtd: 11:52:30.753: error : qemuMonitorCommandWithHandl
er:290 : cannot send monitor command 'info balloon': Connection reset by peer
Dec 11 11:52:30 work kernel: libvirtd[24385]: segfault at c ip 00fa9eb7 sp b43fa
f24 error 4 in libpthread-2.11.so[fa1000+16000]
Dec 11 11:52:30 work libvirtd: 11:52:30.753: error : qemuMonitorTextGetBalloonIn
fo:525 : operation failed: could not query memory balloon allocation