Same problem here Is there any way to check if the plugin is doing anything at all? Below is the code for my comments template.
<?php if ( ! empty($comments_by_type['comment']) ) : ?>
<ol class="commentlist clearfix">
<?php wp_list_comments( array('type'=>'comment','callback'=>'et_custom_comments_display') ); ?>
</ol>
<?php endif; ?>
<?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : // Are there comments to navigate through? ?>
<div class="navigation clearfix">
<div class="nav-previous"><?php previous_comments_link( __( '<span class="meta-nav">←</span> Older Comments', 'Aggregate' ) ); ?></div>
<div class="nav-next"><?php next_comments_link( __( 'Newer Comments <span class="meta-nav">→</span>', 'Aggregate' ) ); ?></div>
</div> <!-- .navigation -->
<?php endif; // check for comment navigation ?>
<!-- Do Not Argue # add tweetback support / needs plugin -->
<?php if ( ! empty($comments_by_type['tweetback']) ) : ?>
<h3 id="Tweets"><?php esc_html_e('Tweetbacks','Aggregate') ?></h3>
<ol class="commentlist">
<?php wp_list_comments('type=tweetback'); ?>
</ol>
<?php endif; ?>
<!-- Do Not Argue # add tweetback support / needs plugin -->
<?php if ( ! empty($comments_by_type['pings']) ) : ?>
<div id="trackbacks">
<h3 id="comments"><?php esc_html_e('Trackbacks/Pingbacks','Aggregate') ?></h3>
<ol class="pinglist">
<?php wp_list_comments('type=pings&callback=et_list_pings'); ?>
</ol>
</div>
<?php endif; ?>