--- Additional comment from berrange@redhat.com on 2012-05-15 12:21:12 EDT ---

Fix comprises the following 3 upstream commits.

commit 03b804a200e214e3faf264b16f41a640c1344962
Author: Daniel P. Berrange <berrange@redhat.com>
Date:   Mon May 14 13:22:58 2012 +0100

    Set a sensible default master start port for ehci companion controllers
    
commit 1ebd52cb871f87b7868503b28448e96d59e41d63
Author: Daniel P. Berrange <berrange@redhat.com>
Date:   Mon May 14 11:16:22 2012 +0100

    Fix logic for assigning PCI addresses to USB2 companion controllers

commit 2c195fdbf3293792e39bc4f06755ae751025b0ea
Author: Daniel P. Berrange <berrange@redhat.com>
Date:   Tue May 15 16:16:49 2012 +0100

    Fix virDomainDeviceInfoIsSet() to check all struct fields

libvirt-0.9.6.1-1.fc16 has been submitted as an update for Fedora 16.
https://admin.fedoraproject.org/updates/libvirt-0.9.6.1-1.fc16

Package libvirt-0.9.6.1-1.fc16:
* should fix your issue,
* was pushed to the Fedora 16 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing libvirt-0.9.6.1-1.fc16'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2012-9913/libvirt-0.9.6.1-1.fc16
then log in and leave karma (feedback).

Is that fix already in a package for Fedora 17 as well?

Cole, can you answer that?

Yes this fix should be in the version just recently pushed to F17 stable.

libvirt-0.9.6.1-1.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.