Very often klauncher in KDE4 behaves unusually in launching ktorrent: dialog box pops up with the message 'KDEInit could not launch /usr/bin/ktorrent', but nonetheless ktorrent is launched and functions normally. This happens whenever you write in part of the app name (say ktor) and hit the enter key (or click on klauncher's launch button). This behaviour is not seen with klauncher starting any other application.