Frederic:
while investigating Mandriva bug http://qa.mandriva.com/show_bug.cgi?id=29870 and reading gdm code, it seems font size is never set in graphical greeter when not specified in theme, since it defaults to "Sans", see greeter_parser.c:1435 and according to pango_font_description_from_string API documentation, resulting information will give a font size of 0. And when do_font_size_reduction is called after, it still sets font size to 0. Shouldn't we enforce a default font size ? 10 or 12 maybe ?
Out of curiousity, do you have a valid value set in the GDM configuration for GtkRC. If this is set to a valid value, it might
affect how fonts look. The problem may be you have it set to an invalid file? If that doesn't fix the problem, I'd be happy to accept a patch to default to a reasonable fontsize. Brian