I installed Ubuntu 11.10 two days ago and at the same time installed gnome-shell (Unity just doesn't feel right for me).
Everything was working fine until this morning, when logging in my session I found that the interface of gnome shell just wasn't here anymore. I can see my desktop, but instead of the usual notification bar on the top of the screen I only have the equivalent of the right-click menu on the desktop.
The key "Super" doesn't do anything and actually nothing works properly.
I don't know if this is related (Must be) but I did some changes in the NVidia XServer settings. But I did a backup of the xorg.conf file, and even reverting to it doesn't solve my problems...
Any ideas ?