I don't know how, but the file association stuff wasn't working last night. Since I really, really wanted that to work, I looked at main.cpp to see what Win32 needed to be in sync. Main.cpp, as it is, needs WITH_POPT badly, and we haven't been using it on Win32.
Until now. I stayed up all night and made a static build of libpopt.a, and added it to the canned Gtk/Gnu win32 libs. The Gnu-Win32 web site's version of popt had unwanted dependencies.
Now the command-line parsing on Win32 is the same as for the Unices, so things should be relatively unbreakable now.
I also added inkscape.nsi, which is an NSIS (Nullsoft Installer) script which performs some minimalist installer/uninstaller functions. I still need to add the Bitstream Vera fonts to it.
Bob