Hi Tim, can you please post the DXF file from V3 and the equivalent DXF file from V4 so
I can try to compare them and see what might be different between them?

Also if you can post the PDF source file as well that might be good so I can also take
a look at it going through the export code.

If you want to keep them private you can e-mail them to me at moi@moi3d.com .

Also when you load the v4 DXF into AutoCAD can you please run the Audit command
in AutoCAD and see if it complains about something?

Thanks, - Michael