Will the real origin coordinates please stand up!

The Z value for the origin in the pz3 saved from PP2012 is 0.490964 PNU. The only place where this is correctly represented in the interface, is in the Parameter palette of PP2012, and even then, only when the numeric field is expanded by clicking on it.

The value displayed for Z in the PP2012 Joint Editor is not correct.  The value displayed in the Joint Editor is 0.483,  as opposed to 0.490964 on the Parameter palette, and in the pz3. That's a huge difference of  0.007964 PNU, or approximately 20.88 mm.

In the P8 and P6 interfaces, none of the displayed values for Z match the value recorded in the pz3.