the YARPP Related div appears twice in my post: once inside the article (at the bottom, above the meta data div) and once outside the article, at the same hierarchy level.
The result is two identical rows. You can see an example at http://www.monkeyfeeder.com/2012/starting-up/the-single-founder-ordeal/
This problem does not exist in my dev site, but everything I did to isolate the cause was not helping.
http://wordpress.org/extend/plugins/yet-another-related-posts-plugin/