Bad lightning render with 3DS MAx 2013 mentalray.

[Shinamori]

PHEN 0.6     42 MB error: A ray encountered an invalid color (NaN), using black instead.
PHEN 0.7     42 MB error: A ray encountered an invalid color (NaN), using black instead.
PHEN 0.6     42 MB error: A ray encountered an invalid color (NaN), using black instead.
PHEN 0.5     42 MB error: A ray encountered an invalid color (NaN), using black instead.
PHEN 0.7     42 MB error: A ray encountered an invalid color (NaN), using black instead.
PHEN 0.4     42 MB error: A ray encountered an invalid color (NaN), using black instead.

This happens when a light other than the skylight is set to generate caustics.
2012 works fine, even a file I load in 2013 from 2012 works fine, but this one I made in 2013 doesn't render right.



I'm using 3DS Max 2013 64bit.

Win7 Ultimate
AMD PhenonII X4 955 3.3ghz
4GB DDR3 RAM
650GTX 1GD VRAM

Edit: Just tried in a new scene. Seems to do it with the fallout shader, but it doesn't show the errors. Just the color spots.