Same taxonomy term

<?php
    //for in the loop, display all "content", regardless of post_type,
    //that have the same custom taxonomy (e.g. genre) terms as the current post
    $backup = $post;  // backup the current object
    $found_none = '';
    $taxonomy = 'kund';//  e.g. post_tag, category, custom taxonomy
    $param_type = 'kund'; //  e.g. tag__in, category__in, but genre__in will NOT work
    $post_types = get_post_types( array('public' => true), 'names' );
    $tax_args=array('orderby' => 'none');
    $tags = wp_get_post_terms( $post->ID , $taxonomy, $tax_args);
    if ($tags) {
      foreach ($tags as $tag) {
        $args=array(
          "$param_type" => $tag->slug,
          'post__not_in' => array($post->ID),
          'post_type' => $post_types,
          'showposts'=>-1,
          'caller_get_posts'=>1
    );
    $my_query = null;
    $my_query = new WP_Query($args);
    if( $my_query->have_posts() ) {
      while ($my_query->have_posts()) : $my_query->the_post(); ?>

            -- My stuff here --

        <?php $found_none = '';
        endwhile;
        }
      }
    }
    if ($found_none) {
    echo $found_none;
    }
    $post = $backup;  // copy it back
    wp_reset_query(); // to use the original query again
    ?>
    </div> <!-- end thumbnail area -->