Are you posting via flickr? I have a feeling that you are as I'm looking at your post content and am seeing this:
<!-- or (function_exists('is_tag') and is_tag()) -->
<a href="http://www.flickr.com/photos/wanderingeyes/810678615/" title="photo sharing"><img src="http://farm2.static.flickr.com/1332/810678615_6f3e433662.jpg" class="flickr-photo" alt="" /></a><br />
</div> <!-- .entry-content -->
I'm looking at that lone closing p tag followed by an opening one and am wondering if that's causing the issue.
Looks like every post is like that. Not sure if that would affect it though.