Build of firefox 2.0.0.7 fails during checksum of source tar file.  I 
think the source is now in a format different thatn what pkgsrc can handle.

I am using the pkgsrc tar files from the current where most tar sets are 
dated 10/06/2007.
Working and repository revision of "www/firefox/distinfo" is 1.69.
Working and repository revision of "www/firefox/Makefile" is 1.46.
Working and repository revision of "www/firefox/Makefile-firefox.common" 
is 1.48.
Working and repository revision of "www/firefox/Makefile-firefox.common" 
is 1.23.
Working and repository revision of "www/firefox/hacks.mk" is 1.2.

======================================
t5048$ make                
=> Bootstrap dependency digest>=20010302: digest-20070803 found
=> Fetching firefox-2.0.0.7-source.tar.bz2
checksum: Checksum SHA1 mismatch for firefox-2.0.0.7-source.tar.bz2
ERROR: Make sure the Makefile and checksum file 
(/usr/pkgsrc/www/firefox/../../www/firefox/distinfo)
ERROR: are up to date.  If you want to override this check, type
ERROR: "/usr/bin/make NO_CHECKSUM=yes [other args]".
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/www/firefox
t5048$
===========================================

I ran the suggested command, and it still bombed.
t5048$ /usr/bin/make NO_CHECKSUM=yes
=> Bootstrap dependency digest>=20010302: digest-20070803 found
=> Fetching firefox-2.0.0.7-source.tar.bz2
===> Extracting for firefox-2.0.0.7
bzcat: /usr/pkgsrc/distfiles//firefox-2.0.0.7-source.tar.bz2 is not a 
bzip2 file.
tar: End of archive volume 1 reached
tar: Sorry, unable to determine archive format.
=> Fixing pkgconfig files.
cd: can't cd to /usr/pkgsrc/www/firefox/work/mozilla
*** Error code 2

Stop.
make: stopped in /usr/pkgsrc/www/firefox
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/www/firefox
t5048$

I ran make makedistinfo and the build bombed with another message.