I use BitComet 0.70
Try using utorrent, I've never had problems with a torrent.
Ok, this is a weird problem, but I don't know where else to ask. Whenever this user uploads torrents, I'm not able to go to the tracker without firefox crashing. On tracker pages where the name is shown firefox will crash (IE doesn't crash but shows their username as 新垣� instead of the name), but if that person's name isn't on the page at the time, firefox will load fine. I can look at the person's profile with no problem, so it's not a character encoding problem.