Gracias Zanguanga por la respuesta.
Te cuento, desactivé uno a uno los plugins y no hay cambios.
Subo los códigos del home y del js del slide, a ver si alguien puede orientarme, porque no doy con ello. Muchas Gracias.
Código PHP:
Ver original<?php get_header(); ?>
<!-- begin slider -->
<!-- begin slider -->
<div id="slider" >
<div class="stepcarousel">
<div class="belt">
<?php
$slider_query = new WP_Query($query_string.'&posts_per_page=-1');
if ($slider_query -> have_posts()) : while ($slider_query -> have_posts()) : $slider_query -> the_post();
$featured = get_post_meta($post->ID, 'featured', $single = true);
$featured_image = get_post_meta($post->ID, 'featured_image', $single = true);
if($featured =='1'){?>
<!-- slider item -->
<div class="panel">
<div class="image"><a href="
<?php the_permalink
(); ?>"><img src="
<?php echo $featured_image ?>" border="0" alt="
<?php the_title
(); ?>" /></a></div>
<div class="right">
<div class="text">
<div class="featured"><img src="<?php bloginfo('template_url'); ?>/images/ico_star.png" alt="Featured" /> FEATURED PROJECT</div>
<h1><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h1>
<?php the_excerpt(); ?>
</div>
</div>
</div>
<?php } ?>
<?php endwhile; ?>
<?php endif; ?>
</div>
</div>
</div>
<!-- end slider -->
<!-- begin home boxes -->
<?php $box1=get_post(get_option('webfolio_home_box1'));
$box2=get_post(get_option('webfolio_home_box2'));
$box3=get_post(get_option('webfolio_home_box3'));
if(get_option('webfolio_home_box1')!= null && get_option('webfolio_home_box2')!= null && get_option('webfolio_home_box3')!= null){?>
<div id="homeBoxes" class="clearfix">
<div class="homeBox">
<h2><?php echo $box1->post_title?></h2>
<?php echo apply_filters('the_content', $box1->post_content);?>
<a href="<?php echo get_option('webfolio_home_box1_link')?>" class="more-link">read more</a>
</div>
<div class="homeBox">
<h2><?php echo $box2->post_title?></h2>
<?php echo apply_filters('the_content', $box2->post_content);?>
<a href="<?php echo get_option('webfolio_home_box2_link')?>" class="more-link">read more</a>
</div>
<div class="homeBox last">
<h2><?php echo $box3->post_title?></h2>
<?php echo apply_filters('the_content', $box3->post_content);?>
<a href="<?php echo get_option('webfolio_home_box3_link')?>" class="more-link">read more</a>
</div>
</div>
<?php }?>
<!-- end home boxes -->
<!-- slider setup -->
<script type="text/javascript">
stepcarousel.setup({
galleryid: 'slider', //id of carousel DIV
beltclass: 'belt', //class of inner "belt" DIV containing all the panel DIVs
panelclass: 'panel', //class of panel DIVs each holding content
autostep: {enable:true, moveby:1, pause:5000},
panelbehavior: {speed:500, wraparound:false, persist:true},
defaultbuttons: {enable: true, moveby: 1, leftnav: ['<?php bloginfo('template_directory'); ?>/images/but_prev.png', 653, 300], rightnav: ['<?php bloginfo('template_directory'); ?>/images/but_next.png', -170, 300]},
statusvars: ['statusA', 'statusB', 'statusC'], //register 3 variables that contain current panel (start), current panel (last), and total panels
contenttype: ['inline'] //content setting ['inline'] or ['external', 'path_to_external_file']
})
</script>
<?php get_footer(); ?>