F15 now has NetworkManager 0.9 and that has changed some of the API so gupnp 0.16.0 is currently broken against it. Please integration 0.16.1.
gupnp-0.16.1-1.fc15 has been submitted as an update for Fedora 15. https://admin.fedoraproject.org/updates/gupnp-0.16.1-1.fc15
Package gupnp-0.16.1-1.fc15: * should fix your issue, * was pushed to the Fedora 15 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing gupnp-0.16.1-1.fc15' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/gupnp-0.16.1-1.fc15 then log in and leave karma (feedback).
gupnp-0.16.1-1.fc15 has been pushed to the Fedora 15 stable repository. If problems still persist, please make note of it in this bug report.