Did you update from natty with the gnome3 ppa? I had the same problem, i could solve it by getting rid of my old settings
$ gsettings reset-recursively org.gnome.shell
CU Christoph
Did you update from natty with the gnome3 ppa? I had the same problem, i could solve it by getting rid of my old settings
$ gsettings reset-recursively org.gnome.shell
CU
Christoph