I have tried the solution given at your site, but it did not show custom title and description over Facebook sharing page. On my page title and description are dynamic thus cannot be set in meta tag.
Here is the solution tried by me:
<div class="addthis_toolbox addthis_default_style "
addthis:title="I just took this test: Test Title at Meritocruitment"
addthis:description="An Example Description">
<a href="http://www.addthis.com/bookmark.php?v=250&pubid={MyprofileId}" class="addthis_button_compact">Share</a>
<span class="addthis_separator">|</span>
<a class="addthis_button_preferred_1"></a>
<a class="addthis_button_preferred_2"></a>
<a class="addthis_button_preferred_3"></a>
<a class="addthis_button_preferred_4"></a>
</div>
Facebook doesn't work like the other AddThis buttons. Instead of accepting parameters that we pass it, Facebook requests the URL you're sharing and gets the data it displays from the meta and link tags in the header. To control how your page is shared on Facebook you should use OpenGraph tags which are described in Facebook's documentation here: http://developers.facebook.com/docs/opengraph/
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