For some reason Mozilla has removed links to contrib builds from their product pages now.
However you can find contributed builds on their FTP site, here: ftp://ftp.mozilla.org/pub/thunderbird/releases/2.0.0.16/contrib/solaris_pkgadd ftp://ftp.mozilla.org/pub/thunderbird/releases/2.0.0.16/contrib/solaris_tarball William Kucharski This message posted from opensolaris.org
