A couple of blogs with the plugin installed are showing "<p>" at the top of posts.
Disabling the plugin removes this.
When I look at the HTML source I see:
<a href="http://www.antiagingreviewsonline.com" title="<"><</a>p>
The offending plugin user has designated "<" as the link text. Th eplugin is then taking the first instance of "<" in the post content and making it a link, which then breaks the HTML code amd makes "<p>" appear at the top of the blog post.
Plugin needs to be updated so that only whole words can be designated as link text.