First of, I am using the SVN trunk (rev1123052) of KTorrent and likktorrent on my debian unstable (amd64) machine.

I just noticed when I'm trying to open the plugins-tab the KTorrent process is eating up all my CPU and is totally unresponsive. I've tried to uninstall and recompile it, but no luck and it is reproducible every time. Is there any way to debug this and find out what loop it is stuck in? The log does not show anything out of the ordinary.

The following plugins are enabled (if it helps):
Information Widget
IP Filter
Magnet Generator
Media Player
Scripting
Syndication
UPnP

I don't know how and when the webinterface got disabled because I'm *always* using it and can't recall disabling it.

Haven't seen that myself and running latest trunk. If you know how to use gdb, run under gdb and interrupt the process when it is in the infinite loop, then print the backtrace, that should give us some idea where it is looping.

Chances are that this is in KDE code, given the fact that the whole plugin widget is part of kdelibs.

I remember encountering the same bug some time ago. Since I only clicked on the Plugin tab by accident and was able to break out of the loop by clicking on a different tab and waiting for some time I postponed debugging. After some time (and before I managed to obtain a backtrace) the problem disappeared though. Unfortunately I can't remember anymore if I updated only ktorrent in that time or kde as well.