Bug firefox 2.0.0.1

[Benjamin Pavie]

I've just installed the last package of firefox (version 2.0.0.1) via
the command :
portinstall -P firefox

I meet this warning during the installation :
===> Building Chrome's registry...
pkg_add: warning: package 'firefox-2.0.0.1,1' requires 'png-1.2.12_1',
but 'png-1.2.14' is installed
pkg_add: warning: package 'firefox-2.0.0.1,1' requires 'glib-2.12.6',
but 'glib-2.12.7' is installed
pkg_add: warning: package 'firefox-2.0.0.1,1' requires 'gtk-2.10.6_2',
but 'gtk-2.10.6_3' is installed

The problem occur on running firefox.
When an image is displayed inside a <div> over an other >div>, like
here http://smoothgallery.jondesign.net/showcase/gallery/ ,the image
inside the <div> is displayed with green artefacts. (see the .png
attached).

The result is the same if i compile firefox (i did it 1 week ago, the
28th of december).

uname -a
FreeBSD vioben. 6.1-STABLE FreeBSD 6.1-STABLE #0: Fri May 26 01:36:39
CEST 2006     toor at vioben.labo:/usr/obj/files/bsd/src6/sys/ACER-32bit
i386

Benjamin