I use Disqus comments plugin for Wordpress, and the comments section is indented to the right like a blockquote is.
The code appearing in the front end post is:
<div id="disqus_thread"> <div id="dsq-content"> <ul id="dsq-comments"> </ul> </div> </div>
I cannot find any instance of disqus_thread or dsq using a search of the theme folder; not that searching inside file in Windows 7 isn't a complete pain in the arse.
Can you see why this is happening? Example post here.