[Kinanizer]

First, a lot of torrent programs ignore proxy settings, due to tor being tcp-only and torrent being a UDP protocol. Even without that, torrents weren't designed to be anonymity-minded, and a lot of clients send your real IP to the trackers, even if this data is correctly proxied.

Second, and this is in conjunction with the first, a malicious end node can easily determine the source IP of the client, so if you browse the web and torrent on the same circut, your browsing session is blown as well.

Though you could have just googled it.

The torrenting program i recommended, uTorrent, does allow proxies, and I didn't bother to Google it because I don't use Tor anyway. Although thank you for the information, may I update the OP with your quote?