Firstly I just wanna thank the developers for writing such a sweet application.
That said, the problem i had just encountered today.

Currently using ktorrent-18-11-06 on Fedora 4 2.6.11-1.1369. After closing ktorrent from the KDE trayIcon. I was no longer able to launch ktorrent with the GUI. Normally I have no problems doing this. This just happened today
Anyway, killed all running process of ktorrent and tried again but no luck.
I could see ktorrent's running processes...but no GUI.

Finally, I killed the newly started ktrorrent processes , went into the users home in .kde/share/apps/ and renamed the ktorrent directory.
Ktorrent was able to launch successfully again.

To retain my config, I copied the directories inside the backed up ktorrent directory and noticed the problem occurred again when i copied the tor* directories.

Not sure if its a bug or due to the tor directories somehow getting corrupted but it would be nice if ktorrent was able to recover from that.

Minor issue once the work around was discovered but I just thought i should update you guys.

Thanks again for coding such a great application. Love it!

Probably some file corrupted and ktorrent getting in an infinite loop. Could you put all the tor directories in a zip file and send them to me ? So I can see where it gets stuck.