8.0-RC1: Install gnome2 failed

1, Install gnome2 failed from packages

I install freebsd with 8.0-BETA4-i386-dvd1.iso
Then I install kde4 and gnome2 from packages.
My step is:
First: I install kde4 from packages, It's succeed.
Second: I install gnome2 from packages, It's failed and meet following message:
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screensaver-gnome-hacks-5.08_1
Loading of dependent package xscreensaver-gnome-hacks-5.08_1 failed
Loading of dependent package gnome-screensaver-2.26.1_1 failed

But if install gnome2 first, then install kde4, this time all will be succeed.
This bug I have also meet on FreeBSD7.2 and FreeBSD8.0-XXX.
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2, Compile gnome2 failed
Meet following error message:
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===>  Extracting for seahorse-plugins-2.26.2_2
=> MD5 Checksum OK for gnome2/seahorse-plugins-2.26.2.tar.bz2.
=> SHA256 Checksum OK for gnome2/seahorse-plugins-2.26.2.tar.bz2.
===>  Patching for seahorse-plugins-2.26.2_2
===>  Applying FreeBSD patches for seahorse-plugins-2.26.2_2
===>   seahorse-plugins-2.26.2_2 depends on file:
/usr/local/lib/firefox/libgtkembedmoz.so - not found
===>    Verifying install for /usr/local/lib/firefox/libgtkembedmoz.so
in /usr/ports/www/firefox
===>  firefox-2.0.0.20_9,1 is forbidden: too many security issues
http://www.vuxml.org/freebsd/922d2398-9e2d-11de-a998-0030843d3802.html
 http://www.vuxml.org/freebsd/49e8f2ee-8147-11de-a994-0030843d3802.html.
*** Error code 1

Stop in /build/FreeBSD/ports/www/firefox.
*** Error code 1

Stop in /build/FreeBSD/ports/security/seahorse-plugins.
*** Error code 1

Stop in /build/FreeBSD/ports/x11/gnome2.
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Rill