Me being me, I decided to fiddle, and found out that the 2 xorg.conf files I had were different.
one was from
the other was from
and while the x11 one was correct, it took me a while to figure out that if I put the correct as a replacement for the incorrect one (usr/share/xresprobe) it would fix it. I have no idea how this worked or why, but I think, since it appears to be the only way to solve a wee bug (after getting the latest nvidia drivers, the resolution gets sucked down to 800x600-Both Myslef and nante have experienced this, but in the thread, which can be found here http://www.linuxmint.com/forum/viewtopic.php?t=2970 I fixed it by doing what I said above. I am also part of a number of people helping out nante, although my advice which worked for myself appears to be being poo-pooed by people who claim that all conf files can be found in /etc.
This may appear churlish, obstinate and downright upstart-y but I may have found one outside of it, and with changes to it fixed my problem.
Can anyone explain to me why xresprobe is there, and how, if at all it affects the display (in my case, letting me see it in all its 1280x1024 glory.)?