Related posts code and wp 3.8 broken

I have hardedcoded my related post code in my themes side bar and I am on WP-Engine. They have updated my blogs to be on WP 3.8 and a few things happened. The main issue I need to fix asap is the Related Posts code I did. I am not sure why it stopped and im not a guru of PHP so I may need help here figuring out why its not working. Here is the code I wrote:

<?php if (is_single()): ?>
		<section>
			<h3>Related Posts</h3>

			<?php
			global $post;
$do_not_duplicate = array();
			$cats = wp_get_post_categories($post->ID);
			if (count($cats) > 0):
			$args = array('category__in' => array($category->term_id), 'post__not_in' => $do_not_duplicate, 'numberposts' => 10, 'category' => implode($cats, ","), 'exclude' => $post->ID, 'caller_get_posts'=> 1);
			$count = 0;
			$related_posts = get_posts( $args );
			if (count($related_posts)): ?>

			<ul>
				<?php foreach ($related_posts as $post) :  setup_postdata($post); if (!in_array($post->ID, $do_not_duplicate) && $count < 3) : $do_not_duplicate[] = $post->ID; $count++; ?>

				<li><a href="<?php the_permalink() ?>"><?php if ( get_the_title() ) the_title(); else the_ID(); ?>
				</a></li>
				<?php endif; endforeach; ?>
			</ul>

			<?php else: ?>
			<p>No related posts found.</p>
			<?php endif; ?>
			<?php else: ?>
			<p>No related posts found.</p>
			<?php endif; ?>
		</section>
            <?php endif; ?>

Please let me know if you need any more information for this issue.

Here is a link to the site: http://blog.chrobinson.com/global-transportation/strategic-inbound-optimization/