I thought I might mention a new version
which has features that many have looked for
like a clean & useful search with plugins
for many favorite engines
(you can write your own too)
its a release candidate, expect some bugs
but it has been stable and useful for me
and the only bug so far
is that after installing qbittorent
deluge no longer works - python error
debs prepared to install on Ubuntu
a launchpad ppa assists this
(even compiled for amd64)

http://www.qbittorrent.org/

also new development
in Transmission


regards,

9-)