"firefox-3.0.5,1 has known vulnerabilities"

[Guill. Moreno-Socias]

   Hello.
   I am trying to install www/firefox3 using portupgrade.  The ports
tree is up to date.
   I get the following:

--->  Fresh installation of www/firefox3 started at: Tue, 06 Jan 2009
23:22:39 +0100
--->  Installing 'firefox-3.0.5,1' from a port (www/firefox3)
--->  Build of www/firefox3 started at: Tue, 06 Jan 2009 23:22:41 +0100
--->  Building '/usr/ports/www/firefox3'
===>  Cleaning for firefox-3.0.5,1
===>  WARNING: Vulnerability database out of date, checking anyway
===>  firefox-3.0.5,1 has known vulnerabilities:
=> mozilla -- multiple vulnerabilities.
   Reference: <http://www.FreeBSD.org/ports/portaudit/e190ca65-3636-11dc-a697-000c6ec775d9.html>
=> Please update your ports tree and try again.
*** Error code 1

Stop in /scratch/ports/www/firefox3.
*** Error code 1

Stop in /scratch/ports/www/firefox3.
** Command failed [exit code 1]: /usr/bin/script -qa
/tmp/portupgrade.15943.0 env make
** Fix the problem and try again.
--->  Build of www/firefox3 ended at: Tue, 06 Jan 2009 23:22:47 +0100
(consumed 00:00:06)
--->  Fresh installation of www/firefox3 ended at: Tue, 06 Jan 2009
23:22:47 +0100 (consumed 00:00:08)
--->  ** Install tasks 1: 0 done, 0 ignored, 0 skipped and 1 failed
--->  Listing the results (+:done / -:ignored / *:skipped / !:failed)
        ! www/firefox3  (unknown build error)
--->  Packages processed: 0 done, 0 ignored, 0 skipped and 1 failed

   It seems to me that the warning is obsolete.
   What can I do?
   "uname -a" gives:

FreeBSD fermat.math.uvsq.fr 6.3-RELEASE-p1 FreeBSD 6.3-RELEASE-p1 #1:
Fri Apr 18 14:47:22 CEST 2008
root at fermat.math.uvsq.fr:/usr/obj/usr/src/sys/FERMAT_6_3_080416  i386

   Thanks in advance.

-- 
Guillermo Moreno-Socías