SOLVED
It turns out this is being caused by my maxwell.mll plugin. The is version 2.7.20 x64 and maya 2013 x64 SP2.
I have notified both next limit and autodesk. Also, once enabled in a scene the maxwell.mll cannot be disabled. It embeds itself in the scene and what is worse if you create a new scene it will stay on and be forever embedded in the new scene!
And this is why I hate using plugins in Maya. This cost me an entire day and I don't get paid to debug 3rd party plugins!
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 19-11-2012 at 09:03 PM.