What happens when you run Gtk-gnutella from the console? Do you get output like:
GLib-GObject-WARNING **: plugin 'oxygen-gtk' failed to register type 'OxygenStyle' If so, this is a duplicate of bug 784379. -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to gtk2-engines-oxygen in Ubuntu. https://bugs.launchpad.net/bugs/781026 Title: gtk-gnutella fails to start if theme set to oxygen-gtk -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs