GtkWarning.

Hi all,
after upgrading matplotlib to 0.84 (with python 2.4.1) I get the following warning message:

/sw/lib/python2.4/site-packages/matplotlib/backends/backend_gtk.py:998: 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)

AFAICU the message is related to the gnome icons, but I've checked and the last avaible version of the gnome icons package is installed on my system. Anyone here can help me in fixing this?

Thanks,
  Andrea.