RPM repositories no longer maintained? / outdated repos
www.tpo states:
https://www.torproject.org/docs/rpms.html.en
Do not use the packages in the native repositories. They are frequently out of date. That means you'll be missing stability and security fixes.
but, packages in the repository are outdated itself: http://deb.torproject.org/torproject.org/rpm/
btw: Fedora 15 reaches EOL on 2012-06-26