Version: (using KDE 4.2.2) OS: Linux Installed from: Ubuntu Packages "Detachable extenders" are popups from plasma widgets, which can be dragged onto the desktop as a separate widget. i) Open a window e.g. Konsole. ii) Click on the digital clock to open the calendar popup. iii) Drag the calendar popup by it's title, to detach it from the clock; drag it over to the Konsole window in one movement. -> The calendar should add itself to the desktop. Instead it crashes plasma. This is not 100% reproducible. Possibly it depends on the size of the window, and the timings of the mouse drag movement. So I'll try to install Kubuntu so I can install dbg packages and get a proper backtrace.
already fixed in 4.3