It's a little obscure. And it will apparently break your plugin settings. But on quantal there is a simple fix:
dconf reset -f /org/compiz/ ** Also affects: compiz Importance: Undecided Status: New ** Changed in: compiz Importance: Undecided => Low ** Changed in: compiz (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1047138 Title: ccsm: clicking on Preferences > "Reset to defaults" may have some bad consequences when in a unity session, switching Backends likely even worse. To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1047138/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp