ktorrent will work with this magnet link which is from kickasstorrents website:

Code:
magnet:?xt=urn:btih:BFEFB51F4670D682E98382ADF81014638A25105A&dn=opensuse+13+2+dvd+x86+64+iso&tr=udp%3A%2F%2Fopen.demonii.com%3A1337%2Fannounce
It dosent work with this one though from theoldpiratebay:

Code:
magnet:?xt=urn:btih:bfefb51f4670d682e98382adf81014638a25105a&dn=openSUSE+13.2+DVD+x86_64.iso&xl=4678746112&dl=4678746112
Strangely enough qBittorrent will work fine with both. When I say it dosent work I mean it takes a long time to find any peers, 5-10 minutes plus, it never really gets started tbh. Any ideas what causes this? What makes one of those magnet links different from the other? Any settings I can change in ktorrent to fix this?