In 12.04, I just tried the pane-setting 'resize' (or autoshrink or what it is named). Now, I don't like it any longer and I would like to switch back. But since the panel is shrunken, there is no longer a place where I can click (with Super+Alt+rightclick), I'm always in one or another application which lies in the panel.
So, is there another way than clicking on an empty space in the panel to open the settings?