Hrm...
It's inexplicable, but it worked, despite all the errors
Never had that happen before!
I booted into Gnome-Shell, expecting it to go into fallback mode, but...
Code:
vindsl@Zuul:~$ apt-cache policy nvidia-current-updates
nvidia-current-updates:
Installed: 304.64-0ubuntu1
Candidate: 304.64-0ubuntu1
Version table:
*** 304.64-0ubuntu1 0
500 http://archive.ubuntu.com/ubuntu/ raring/restricted i386 Packages
100 /var/lib/dpkg/status
304.51-0ubuntu1 0
500 http://archive.ubuntu.com/ubuntu/ quantal/restricted i386 Packages
vindsl@Zuul:~$ apt-cache policy nvidia-settings
nvidia-settings:
Installed: 304.64-0ubuntu1~quantal~xup1
Candidate: 310.14-0ubuntu1~xedgers~quantal2
Version table:
310.14-0ubuntu1~xedgers~quantal2 0
500 http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu/ quantal/main i386 Packages
*** 304.64-0ubuntu1~quantal~xup1 0
100 /var/lib/dpkg/status
304.60-0ubuntu1~precise~xup2 0
500 http://ppa.launchpad.net/noobslab/nvidia-quantal/ubuntu/ quantal/main i386 Packages
304.51-0ubuntu2 0
500 http://archive.ubuntu.com/ubuntu/ quantal/main i386 Packages
500 http://archive.ubuntu.com/ubuntu/ raring/main i386 Packages