Little Correction of the button positions
Code:
<div style="direction:ltr;overflow:false;height:20px;float:left;">
<script type="text/javascript" src="http://apis.google.com/js/plusone.js"></script><g:plusone size="small" count="false"></g:plusone>
<!--Twitter button starts--><a href="http://twitter.com/share" class="twitter-share-button" data-count="none" data-via="YOUR-TWITTER-USERNAME" data-url="{vb:var script_full_url}">Tweet</a><script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script><!--Twitter button ends-->
<!--Facebook button starts--><iframe src="http://www.facebook.com/widgets/like.php?href={vb:var script_full_url}&layout=button_count&show_faces=false" scrolling="no" frameborder="0" style="border:none; width55px; height:20px;overflow: hidden;"></iframe><!--Facebook button ends-->
</div><br><br>