It seems that one easy and fast way to restore a panel without duplicated icons is to issue the following command within a terminal (or using Alt-F2?):
killall unity-panel-service
(once killed, unity-panel-serice appears to restart itself automatically).
It seems that one easy and fast way to restore a panel without duplicated icons is to issue the following command within a terminal (or using Alt-F2?):
killall unity-panel-service
(once killed, unity-panel-serice appears to restart itself automatically).