[Paraview] Contour widget doesn't see all scalars

[Robert Ferrell]

I'm trying to put isothermal contours on a cut.  The data comes out of a
calculator, and is called ScaledTemperature.  I can create contours of
ScaledTemperature, but I cannot color the contours by ScaledTemperature. 
All my other scalars who up in the Property pull down, but not
ScaledTemperature.

I'm using the released 1.2.  This worked fine in 1.0.

thanks,
-robert