I have this weird problem since the group buttom was added.
I am using gentoo estable, but the same happend to me with Arch, Pardus, Kubuntu, Debian and other distros.



The X is out of the box i can't minimize to tray ktorrent.

There was a bugreport about this, and we made some changes in the development version, which should fix this :

https://bugs.kde.org/show_bug.cgi?id=145369