I have sent a support request for this issue. Does anyone else have this same problem?
I always get crashes when I create expressions in the Expression Editor when the 3DConnexion driver is running within Maya 2012. As soon as I disable the driver, Maya does not crash when creating expressions. For example try this procedure:
-Start Maya.
-Create a Pipe primative.
-Ctrl + Right Click the RotateY value in the Channel Box and access the Expression Editor.
-Enter this code as the expression:
float $radius = 1;
float $distance = pPipe1.translateZ;
float $rotation = $distance / (2 * 3.142 * $radius) * 360;
pPipe1.rotateY = $rotation;
Hit “Create”. Maya crashes every time. But if you disable the 3DConnexion driver, Maya will not crash.

