DIVs not closed properly?

I'm having trouble validating slideshow node add/edit pages. I believe there's one too many

closing tags in the code. I think the problem may lie in lines 168-178:

  $form['slideshow'] = array(
    '#type' => 'fieldset',
    '#access' => user_access('attach images as slideshow'),
    '#title' => t('Slideshow settings'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
    '#description' => t('Attached images are displayed in the form of a slideshow.'),
    '#weight' => 35,
    '#suffix' => '</div>',
    '#tree' => TRUE,
  );