Comment 8 for bug 406627

All I can see (by opening the file with inkscape r21933 or exporting it to PDF via CLI) is a missing background for the top right object (and not a black background). With 0.46, the CLI fails but I see no problem with Inkscape GUI.

In the SVG code, this polygon is linked to a linearGradient with id="g23". If you change the link (with an external text editor) and use style="fill:url(#g21)", it seems to work well (g21 is exactly the same linearGradient as g23!) and the gradient is correctly exported to PDF via CLI.

Strangely, if you open the file in Inkscape r21933 and use XML editor, the id of linearGradient g23 is changed to "linearGradient482" (doesn't occur with 0.46).