Realmd depends on glib-networking, but it does not have it in rpm dependencies.
realmd-0.13.3-2.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/realmd-0.13.3-2.fc19
realmd-0.13.3-2.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.