I've committed the patch (SVN revision 19239) and removed the use of sodipodi:docbase in the Python scripts (revision 19238). The script svg_and_media_zip_output.py appears to be completely broken anyway (on Windows, at least).
So I'm marking this bug as fixed, as there is no longer any sodipodi:docbase to update, even when opening files originally created in older versions of Inkscape (or Sodipodi).
I've committed the patch (SVN revision 19239) and removed the use of sodipodi:docbase in the Python scripts (revision 19238). The script svg_and_ media_zip_ output. py appears to be completely broken anyway (on Windows, at least).
So I'm marking this bug as fixed, as there is no longer any sodipodi:docbase to update, even when opening files originally created in older versions of Inkscape (or Sodipodi).