Almost there, Z lifting .44 (no replies)

Thanks to all the help from this forum, I have almost finished dialing in my Mendel.
I have the correct extrusion length, but here is a print that I'm testing thin walls. The Z axis is lifting .44 before it starts printing and that is messing up the first layer.
Where can I tweak this so that it doesn't lift?

\Mendel_Reprap\stl\0.5mm-thin-wall_export.gcode

It took 51 seconds to export the file.

0 mm of filament used in this print

the print goes from 74.979000 mm to 105.006000 mm in X
and is 30.027000 mm wide

the print goes from 74.981000 mm to 185.000000 mm in Y
and is 110.019000 mm wide

the print goes from 0.441000 mm to 9.891000 mm in Z
and is 9.450000 mm high

Estimated duration (pessimistic):  22 layers, 00:06:42
Extruding 1.000000mm of filament.