The code (X)HTML generated by YARP it's not correct... ¿you know XHTML???:
For example:
For example: <li></li> or <dl></dl>
its not the same. oO?
UL, OL = DL
LI = DT and DD
<h4>Related posts</h4><dl>
<dt><a href='PERMALINK1'>RELATED TITLE 1</a>
<dd>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Cras tincidunt...<dd></dt>
<dt><a href='PERMALINK2'>RELATED TITLE 2</a>
<dd>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Cras tincidunt...<dd></dt>
<dt><a href='PERMALINK3'>RELATED TITLE 3</a>
<dd>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Cras tincidunt...<dd></dt>
<dt><a href='PERMALINK4'>RELATED TITLE 4</a>
<dd>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Cras tincidunt...<dd></dt>
<dt><a href='PERMALINK5'>RELATED TITLE 5</a>
<dd>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Cras tincidunt...<dd></dt>
</dl>
brrrr... ¬¬
The excerpt should be into dd (or dt) but dd outside of dt.
http://wordpress.org/extend/plugins/yet-another-related-posts-plugin/