GTK themes and libpixmap?

[Bryan Scaringe]

I recently picked up the theme "DarkMarble" from gtk.themes.org.
Half of the widgets don't work.  Specificly, the ones with pixmaps.
they are just plain blue.  Also, I get a slew of these errors:

Gtk-WARNING **: Unable to locate loadable module in module_path: "libpixmap.so",
Gtk-WARNING **: Unable to locate loadable module in module_path: "libpixmap.so",
Gtk-WARNING **: Unable to locate loadable module in module_path: "libpixmap.so",
Gtk-WARNING **: Unable to locate loadable module in module_path: "libpixmap.so",

Ok, I looked, and indeed, I have no libpixmap.so on my system.
Anyone know where I can find such a beast?  What package contains
it?

thanks in advance,
        Bryan