I want to inform you that this plugin adds a hidden backlink to cmsvoteup.com
After I installed the plugin, I checked my site's performance and found that an image was getting loaded from cmsvoteup.com
This plugin inserts the following code
<a href="http://cmsvoteup.com/joomla-extensions/facebook-like-box-like-recommendation-for-joomla-wordpress/" title="Free Facebook Like Box for WordPress" target="_blank"><img src="http://www.cmsvoteup.com/images/power_by_2x2.gif" border="0"/></a>
with likebox widget.
Please either remove this plugin or take down the plugin from repository.