Sorry for this minor problem, but I cannot find a solution for it. I had some problems which were were already as bugs on which kde4.4.4 crashed and since than I lost this functionality. I cannot say if I have any apps running if they were all minimized as they don’t appear on the taskbar. I can switch through them via Alt-Tab. Can anyone tell me which setting should be reset to get this working? thanks.
Add the task manager widget to your panel