The LSB header of the libvirt init script references a service "avahi". There is no such thing. You probably mean "avahi-daemon".
Also, while we are at it: the chkconfig header of the init script is broken as well, in its "description" field you need to use \ for line continuations, but you don't. See the chkconfig man page for more information.
Note that the description fields of the LSB header do *not* use \ for line continuation. Only the chkconfig header fields need that.
Can you post a patch ?
This bug appears to have been reported against 'rawhide' during the Fedora 13 development cycle.
Changing version to '13'.
More information and reason for this action is here:
libvirt-0.7.7-5.fc13 has been submitted as an update for Fedora 13.
libvirt-0.7.7-5.fc13 has been pushed to the Fedora 13 testing repository. If problems still persist, please make note of it in this bug report.
If you want to test the update, you can install it with
su -c 'yum --enablerepo=updates-testing update libvirt'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/libvirt-0.7.7-5.fc13
libvirt-0.7.7-5.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.