Here's what I did: I recently updated my Debian 7.3 disc images to 7.4, using Jigdo downloads to make sure that only the minimal amount of data would need to be downloaded.
I then decided to make my new images available through the Transmission BitTorrent client.
Everything works great, except that there is one little detail that is puzzling me: on the "debian-7.4.0-i386-DVD-3.iso" torrent, I get a error saying Tracker gave an error: "torrent not found" but even so, it does appear to seed to, at this very moment, four peers. The "information" tab page on the properties says that it has so far uploaded 294.2 MB. Seems strange to me that peers can connect to my client, even though the torrent cannot be found?
Just for info, here is what the "Trackers" tab page has to say about the torrent:
Gor an error "torrent not found" 1 minute ago
Asking for more peers in 8 minutes
Got a scrape error "Error parsing response" 1 minute ago
Asking for peer counts in 28 minutes