Stuff

<?php$slider = query_posts(array('post_type' => 'slider_item', 'column_order' => 'menu_order'));			?>  <!--Slider -->      <div class="outer-slider">        <ul id="slider">        <?php        foreach ($slider as $slide) {         			$link = get_post_meta($slide->ID, 'link', 'true');		$thumbnail = get_the_post_thumbnail($slide->ID);		var_dump($thumbnail);		?>		<li>            <div class="slider-image"><img src="" width="402" height="223" alt="" /></div>            <div class="image-detail">              <h1><?php echo $slide->post_title;?></h1>              <p><?php echo $slide->post_excerpt;?></p>              <a href="<?php echo $link;?>" class="find-more">Click here to find out more</a> </div>          </li>        <?php } ?>		</ul>        <div class="slider-pagination"></div>      </div> <!--/Slider -->