Version: (using KDE KDE 4.0.0)
Installed from: SuSE RPMs
Widgets couldn't be added to Panel. It's impossible to move widgets on the Panel too
There's no more kdesktop and kicker in KDE 4, only plasma.
Widgets can be dragged from the widgets dialog to the panel. Full panel configuration is coming.
*** This bug has been marked as a duplicate of 154119 ***