New Nvidia graphics drivers (v. 313.26) are available from RR repos:
This is also in the Xorg-edgers PPA.
on 03/06/2013 – Made popular on 03/06/2013
Everything was peachy until last night when I updated some packages with aptitude (logs pasted below). I've been using the xorg-edgers PPA for a long time with the latest nvidia drivers, so I figured there was something broken in there.