GtkWarning: Could not find the icon 'gnome-fs-home'

Hi all,

How do I install the missing software ?

/usr/lib/python2.4/site-packages/matplotlib/backends/backend_gtk.py:990:
GtkWarning: Could not find the icon 'gnome-fs-home'. The 'hicolor' theme
was not found either, perhaps you need to install it.
You can get a copy from:
        http://freedesktop.org/Software/icon-theme/releases
  buttons)

Nils