I tried to install gnome3 using a ppa. It made a mess so I reinstalled my system. Now, for some reason, when I enter to the Ubuntu classic session, I get both unity and gnome running at the same time (all my gnome-panels + unity dashboard and menu).
I suppose there is some configuration wrong in my home directory, but I have no idea of what should I change to get only gnome.
Any idea of how can I fix this?