Comment 5 for bug 1489320

attached is a proposed fix for this bug. This implements support for circle and ellipse elements, which had previously been represented as paths. This code can be tested by copying the file to the Inkscape\share\extensions\ directory. In Inkscape 0.91 you will also need to copy the new version of the dxf_outlines.inx file from the repository:
http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/files/head:/share/extensions/

If testing under Inkscape 0.91 you may detect a slight scaling change due to the fact that the new code uses a default 96 dpi for scale conversions while Inkscape 0.91 uses a default 90 dpi.