From the wiki page Import_text_and_geometry_from_Inkscape I read
the svg-import in FreeCAD cannot handle a svg file with a resolution of more than 45 dpi, so check the settings in inkscape
In Inkscape I could not find any option to set the resolution for the SVG format, only for PNG and more.
SVG is a vector format.
I'm wrong, or we must correct page?