This was reported on mediawiki-l: https://lists.wikimedia.org/pipermail/mediawiki-l/2014-August/043248.html I'm able to reproduce it on MediaWiki 1.23.2 with both the 1.23 and master versions of dumpHTML. It looks like this was caused by a visibility change in https://gerrit.wikimedia.org/r/#/c/97371/
Version: master
Severity: major