since many years now i have encoutered this problem, basically lines imported from and to autocad always show a degree of imprecision in the graphic visualisation of the lines like this error.
This error is shown indipendently from the distance to the origin of the drawing.
from Rhino I alwys export with Natural settings, paying attention to export each line, poly and spline with the corresponding format in the autocad.
I wonder what is the cause, and if there is any definitive soliutiont to the problem. Anybody has found a solution?