I'm running Ubuntu 12.10. In system monitor, System tab:

Release 12.10 (quantal) 64-bit
Kernel Linux 3.5.0-19-generic
GNOME 3.6.0

And I see GNOME logo on the left side. Is it supposed to be like that? I installed GNOME once, but returned to Unity (uninstalled GNOME and reinstalled Unity and lightdm)