NOTE: Deluge 0.5.1 and newer uses an svn build of libtorrent. This build differs from a clean libtorrent source checkout and has been hacked in order to get it to work properly with Deluge. As a result, Deluge will likely not build properly against a vanilla libtorrent 0.12 installation or a nightly build oflibtorrent 0.13. It is recommended that you build against our included libtorrent, as our build will not conflict with any installed libtorrent. - zachtib