Portupgrade mozilla fails ...

[Kiffin Gish]

I cannot upgrade Mozilla, getting the following when I run portupgrade
mozilla:

=> mozilla-1.7.12-source.tar.bz2 doesn't seem to exist
in /usr/ports/distfiles/.
=> Attempting to fetch from
http://ftp.mozilla.org/pub/mozilla.org/mozilla/relea
ses/mozilla1.7.12/source/.
fetch: mozilla-1.7.12-source.tar.bz2: local modification time does not
match remote
...
=> Attempting to fetch from
http://www.t.ring.gr.jp/archives/net/www/mozilla/moz
illa/releases/mozilla1.7.12/source/.
fetch: mozilla-1.7.12-source.tar.bz2: local modification time does not
match rem
ote
=> Attempting to fetch from
ftp://ftp.kaist.ac.kr/pub/mozilla/mozilla/releases/m
ozilla1.7.12/source/.
fetch:
ftp://ftp.kaist.ac.kr/pub/mozilla/mozilla/releases/mozilla1.7.12/source/m
ozilla-1.7.12-source.tar.bz2: Protocol error
=> Attempting to fetch from
ftp://mozilla.mirror.pacific.net.au/mozilla/mozilla/
releases/mozilla1.7.12/source/.
fetch: mozilla-1.7.12-source.tar.bz2: local modification time does not
match remote
=> Attempting to fetch from
ftp://ftp.chg.ru/pub/WWW/mozilla/mozilla/releases/mo
zilla1.7.12/source/.
fetch: mozilla-1.7.12-source.tar.bz2: local modification time does not
match remote
=> Attempting to fetch from
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/distfiles/.
fetch:
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/distfiles/mozilla-1.7.12-source.t
ar.bz2: File unavailable (e.g., file not found, no access)
=> Couldn't fetch it - please try to retrieve this
=> port manually into /usr/ports/distfiles/ and try again.
*** Error code 1

Stop in /usr/ports/www/mozilla.
*** Error code 1

Stop in /usr/ports/www/mozilla.
** Command failed [exit code 1]: /usr/bin/script
-qa /tmp/portupgrade73223.0 mak
e
** Fix the problem and try again.
** Listing the failed packages (*:skipped / !:failed)
        ! www/mozilla (mozilla-1.7.11_1,2)      (checksum mismatch)
--->  Packages processed: 0 done, 0 ignored, 0 skipped and 1 failed

Any ideas what is going wrong?

-- 
Kiffin Gish
Gouda, The Netherlands