Save multiple checkboxes with metabox.

Hi,

I’m trying to save mutliple checkboxes as metabox, but only the last selection is saved. :/
I’m using jQuery multipleSelect and when I’m looking at the value, all values should be there.
Going crazy over here, any suggenstions?

Form:

<p>
<link href="<?php echo get_stylesheet_directory_uri() ; ?>/css/multiple-select.css" rel="stylesheet"/>

<label for="_meta_box_select_options">V?lj kolumnen att lista: </label>
<select multiple="multiple" name="_meta[list_options]" id="_meta_box_select_options">
  <?php
  // List has been loaded in meta-functions.php
  $i=0;
  foreach ($list as $item) {
    $i++;
    echo('<option value="' . $i . '">' . $item . '</option>');
  } ?>
</select>

<script src="<?php echo get_stylesheet_directory_uri() ; ?>/js/dev/jquery.multiple.select.js"></script>
<script>
        var $ =jQuery.noConflict();
        $(function() {
          $("#_meta_box_select_options").multipleSelect({
              selectAll: false,
              multiple: true,
              multipleWidth: 250,
              width: '100%',
              onClose: function() {
                var k = $("#_meta_box_select_options").multipleSelect("getSelects");
                var text = k.toString();
               $("#_meta_box_select_options").val(text);
              }
          });
        });
</script>
</p>

Functions:
global $post;

$meta = get_post_meta($post->ID,’_meta’,TRUE);

// Get all pages available
$args = array(
‘sort_order’ => ‘ASC’,
‘sort_column’ => ‘post_title’,
‘post_type’ => ‘page’,
‘child_of’ => 0,
‘parent’ => -1,
‘post_status’ => ‘publish’
);

$pages = get_pages($args);

// Set previous selection
$selected = $meta[‘list_select’];

// Fetch the HTML
include(THEME_FOLDER . ‘/UI/meta-form.php’);

echo ‘<input type=”hidden” name=”_meta_noncename” value=”‘ . wp_create_nonce(__FILE__) . ‘” />’;

Save:

if (!wp_verify_nonce($_POST['_meta_noncename'],__FILE__)) return $post_id;

    // check user permissions
    if ($_POST['post_type'] == 'page')
    {
        if (!current_user_can('edit_page', $post_id)) return $post_id;
    }
    else
    {
        if (!current_user_can('edit_post', $post_id)) return $post_id;
    }

    // authentication passed, save data

    $current_data = get_post_meta($post_id, '_meta', TRUE);
    $new_data = $_POST['_meta'];

    meta_clean($new_data);

    if ($current_data)
    {
        if (is_null($new_data)) delete_post_meta($post_id,'_meta');
        else update_post_meta($post_id,'_meta',$new_data);
    }
    elseif (!is_null($new_data))
    {
        add_post_meta($post_id,'_meta',$new_data,TRUE);
    }

BR,
NinjaRat