WP: Dynamic Breadcrumbs

gistfile1.txt

<div id="breadcrumbs">
  <a href="<?php echo get_bloginfo('url'); ?>" title="">Home</a>
  <?php
    $parent_id  = $post->post_parent;
    $breadcrumbs = array();
    while ($parent_id) {
      $page = get_page($parent_id);
      $breadcrumbs[] = '<a href="'.get_permalink($page->ID).'" title="'.get_the_title($page->ID).'">'.get_the_title($page->ID).'</a>';
      $parent_id  = $page->post_parent;
    }
    $breadcrumbs = array_reverse($breadcrumbs);
    foreach ($breadcrumbs as $crumb) echo ' / '.$crumb;
  ?>
</div>
<h1><?php the_title(); ?></h1>