Post duplicated twice

Hi there,

I’m running a site over at http://www.justuber.com/blog , and I’ve recently noticed a problem.

When opening a single post, for example – http://www.justuber.com/blog/2008/05/10/valves-source-engine-coming-to-linux/ the post is repeated twice. I don’t know exactly when this problem occured, so I can’t suggest what it is I’ve done recently. I’ve checked the single.php file and I can’t see anything wrong with it. I’ve included it here though!

Any ideas?

<?php get_header(); ?>

	<div id="content" class="widecolumn">

  <?php if (have_posts()) : while (have_posts()) : the_post(); ?>

		<div class="navigation">
			<div class="alignleft"><?php previous_post_link('&laquo; %link') ?></div>
			<div class="alignright"><?php next_post_link('%link &raquo;') ?></div>
		</div>

		<div class="post" id="post-<?php the_ID(); ?>">
			<h2><a href="<?php echo get_permalink() ?>" rel="bookmark" title="Permanent Link: <?php the_title(); ?>"><?php the_title(); ?></a></h2>

			<div class="entry">
				<?php the_content('<p class="serif">Read the rest of this entry &raquo;</p>'); ?>

				<?php link_pages('<p><strong>Pages:</strong> ', '</p>', 'number'); ?>

				<p class="postmetadata alt">
<div class="author">Posted by <?php the_author() ?></div></p>
<p><script type="text/javascript"><!--
google_ad_client = "pub-2986679104636184";
google_ad_width = 468;
google_ad_height = 60;
google_ad_format = "468x60_as";
google_ad_type = "text_image";
//2007-08-11: banner
google_ad_channel = "7930932154";
google_color_border = "FFFFFF";
google_color_bg = "FFFFFF";
google_color_link = "6728B2";
google_color_text = "000000";
google_color_url = "008000";
//-->
</script>
<script type="text/javascript"
  src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</p>
<!--Funky post to various engines thingy-->
<p><a href="http://del.icio.us/post?url=<?php the_permalink() ?>&title=<?php the_title() ?>"><img src="http://justuber.com/blog/images/delicious.png" alt="Post to del.icio.us" title="Post to deli.icio.us" border="0"> Post to del.icio.us</a></p>
<p><a href="http://slashdot.org/bookmark.pl?url=<?php the_permalink() ?>&title=<?php the_title() ?>"><img src="http://justuber.com/blog/images/slashdot.png" alt="Post to Slashdot" title="Post to Slashdot" border="0"> Post to Slashdot</a></p>
<p><a href="http://digg.com/submit?phase=2&url=<?php the_permalink() ?>&title=<?php the_title() ?>"><img src="http://justuber.com/blog/images/digg.png" alt="Digg this" title="Digg this" border="0"> Digg this</a></p>
<!--End funky post to various engines thingy-->
					<small>
						This entry was posted
						<?php /* This is commented, because it requires a little adjusting sometimes.
							You'll need to download this plugin, and follow the instructions:
							http://binarybonsai.com/archives/2004/08/17/time-since-plugin/ */
							/* $entry_datetime = abs(strtotime($post->post_date) - (60*120)); echo time_since($entry_datetime); echo ' ago'; */ ?>
						on <?php the_time('l, F jS, Y') ?> at <?php the_time() ?>
						and is filed under <?php UTW_ShowTagsForCurrentPost("commalist") ?>.
						You can follow any responses to this entry through the <?php comments_rss_link('RSS 2.0'); ?> feed.

						<?php if (('open' == $post-> comment_status) && ('open' == $post->ping_status)) {
							// Both Comments and Pings are open ?>
							You can <a href="#respond">leave a response</a>, or <a href="<?php trackback_url(true); ?>" rel="trackback">trackback</a> from your own site.

						<?php } elseif (!('open' == $post-> comment_status) && ('open' == $post->ping_status)) {
							// Only Pings are Open ?>
							Responses are currently closed, but you can <a href="<?php trackback_url(true); ?> " rel="trackback">trackback</a> from your own site.

						<?php } elseif (('open' == $post-> comment_status) && !('open' == $post->ping_status)) {
							// Comments are open, Pings are not ?>
							You can skip to the end and leave a response. Pinging is currently not allowed.

						<?php } elseif (!('open' == $post-> comment_status) && !('open' == $post->ping_status)) {
							// Neither Comments, nor Pings are open ?>
							Both comments and pings are currently closed.

						<?php } edit_post_link('Edit this entry.','',''); ?>

					</small>
				</p>

			</div>
		</div>

	<?php comments_template(); ?>

	<?php endwhile; else: ?>

		<p>Sorry, no posts matched your criteria.</p>

        <?php endif; ?>

	</div>

	<?php get_sidebar(); ?>

<?php get_footer(); ?>