Driver issues with Direct2D and FillGeometry?

Hi all

I have a MFC program that use Direct2D to paint.
The application is using SetTransform to manipulate a view that shows a model containing objects created with FillGeometry.
When I zoom in I get horizontal and vertical lines in a shape that should have been filled.

It feels very much like a driver bug, because it is working on some graphics cards and on windows 7.

I have made a post with pictures and code here.

I am hoping that some of the experts in here can either confirm that this is a driver bug or indicate if this is by design because of some limitation in the graphic card hardware.

Thank you very much of any help.