It appears the upstream file for docbook-sgml-dtd-4.2 may have changed as the digest no longer matches the file. This ebuild doesn't go through the mirrors so it doesn't appear to be an issue in that regard. I didn't assign or CC to anyone in particular, just pulling names out of the text-markup herd in herds.xml. If there's a better way to file in the future, lemme know.
I downloaded this from the mirrors, then downloaded from the master site, and the digest seemed to match both times. Jason, is this still a problem for you?
no activity, and there would've been more bugs if this was valid.