cbournak

I figured it out. This works:

<!-- CAROUSEL -->
<section id="slider">
      <div class="flexslider">
        <ul class="slides">
        <?php query_posts(array('post_type' => 'slides', 'posts_per_page' => -1)); if(have_posts()) : while(have_posts()) : the_post(); ?>
		<?php $background = wp_get_attachment_image_src( get_post_thumbnail_id( $page->ID ), 'full' ); ?>
		<li class="slide" style="background: url('<?php echo $background[0]; ?>') no-repeat center center;">
       </li>
        <?php endwhile; endif; wp_reset_query(); ?>
        </ul>
    </div>
</section>

Sorry, I was using BrowserStack and didn’t realize it was reusing the wrong URL. It’s working fine.