There is a typo in /etc/init.d/sipwitch:110 s/theb/then/
sipwitch-0.7.6-0.fc13 has been submitted as an update for Fedora 13. http://admin.fedoraproject.org/updates/sipwitch-0.7.6-0.fc13
sipwitch-0.7.6-0.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.