Last modified: 2013-05-22 18:23:56 UTC
I decided not to mess with this article for the purpose of studying this bug: http://en.wikipedia.org/w/index.php?title=Nonprofit_organization&diff=499397921&oldid=497923589 The extra new line whitespace was not visible or editable when clicking the section edit links that came before or after the whitespace. I had to edit the whole article to remove it.
Special:Version says this at the time this bug was discovered: MediaWiki 1.20wmf5 (b728521) and linked to here: https://gerrit.wikimedia.org/r/gitweb?p=mediawiki/core.git;h=b7285216fcb5e4778bbc6c359db7d260b6ceb02a