I'm having the same problem on 8.10 with KDE 4.2. This happens when launching Konsole using Alt-F2 (KRunner) or when copying the launch icon from the Application Launcher to the Panel and starting Konsole from the Panel.
When setting 'DBUS registration' is set to 'None' on the Panel icon (instead of 'Single Instance'), the error does not occur.
I'm having the same problem on 8.10 with KDE 4.2. This happens when launching Konsole using Alt-F2 (KRunner) or when copying the launch icon from the Application Launcher to the Panel and starting Konsole from the Panel.
When setting 'DBUS registration' is set to 'None' on the Panel icon (instead of 'Single Instance'), the error does not occur.