$ rtorrent foobar.torrent rtorrent: symbol lookup error: rtorrent: undefined symbol: _ZN7torrent10ThreadBase8m_globalE
Why is this happening?
The first hit on google leads you to https://github.com/rakshasa/rtorrent/issues/81 which points you to https://github.com/repoforge/rpms/issues/206 which finally offers a repo that works: http://www.fateyev.com/RPMS/RHEL6/base/.
I have been using those packages for some time w/o issue.