Comment 3 for bug 596842

reproduced with Inkscape 0.47+devel r9515 on OS X 10.5.8

Do you know which software was used to originally create the drawing? Did you paste or import it from a PDF or EPS file and possibly still have the original? The markers are not part of Inkscape's stock markers and appear to be the result of a conversion from a different file format or output from another application (when looking at the file structure and the auto-generated names of the IDs).