The only available packages for qbittorrent on F21 are alpha releases. You should at least make the latest stable release (3.1.11) available as an option from yum.
I'm not going to revert to 3.1.11
rb_libtorrent-1.0.4-1.fc21, qbittorrent-3.2.0-0.14.git866f965.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/rb_libtorrent-1.0.4-1.fc21,qbittorrent-3.2.0-0.14.git866f965.fc21
rb_libtorrent-1.0.4-1.fc22, qbittorrent-3.2.0-0.14.git866f965.fc22 has been submitted as an update for Fedora 22. https://admin.fedoraproject.org/updates/rb_libtorrent-1.0.4-1.fc22,qbittorrent-3.2.0-0.14.git866f965.fc22
qbittorrent-3.2.0-0.15.git866f965.fc22, rb_libtorrent-1.0.4-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
rb_libtorrent-1.0.4-1.fc21, qbittorrent-3.2.0-1.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.