NVIDIA have released driver 319.82, and now 331.38, and they install OK on kernel 3.12, but – unfortunately – still need the patch for kernel 3.13, despite the fact that 3.13 Final is due in about a week from now..

modprobe: ERROR: could not insert 'nvidia': Unknown symbol in module, or unknown parameter (see dmesg)
make[1]: *** [package-install] Error 1

The patch is mentioned in a previous article:  http://rglinuxtech.com/?p=948

With the patch, the drivers compile and install OK with 3.13-rc8..

Robert Gadsdon   January 14, 2014 – Updated to include just-released 331.38..