Simple Tagging Plugin: Problem mit WP Loop

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
  <div class="entry <?php if(is_home() && $post==$posts[0] && !is_paged()) echo ' firstpost';?>">
    <h3 class="entrytitle" id="post-<?php the_ID(); ?>"> <a href="<?php the_permalink() ?>" rel="bookmark">
      <?php the_title(); ?>
      </a> </h3>
      <div class="entrymeta">
            <?php the_time('l, j. F Y'); 
                // echo " | Kategorie: ";the_category(','); 
                echo " | ";
                comments_popup_link( 'Kommentare: 0','Kommentare: %','Kommentare: %', 'comments-link ','Kommentare sind geschlossen ');
                edit_post_link('bearbeiten', ' [<i>','</i>]');
                echo '<br>Tags: ';
                STP_PostTags();
            ?>
        </div>
    <div class="entrybody">
      <?php the_content(__('mehr...'));?>
      
    </div>
    
    <!--
    <?php trackback_rdf(); ?>
    -->
    
  </div>
  
  <?php comments_template(); // Get wp-comments.php template ?>
  <?php endwhile; else: ?>
  <p>
    <?php _e('Sorry, no posts matched your criteria.'); ?>
  </p>
  <?php endif; ?>