Added a page break causes the button label text duplicate

When pagebreaks are on the form, and you page forward to the page with the fieldsets on it, the webform_addmore_form_alter function (and therefore drupal_add_js) runs twice - I'm not sure why - page forward again and then page back webform_addmore_form_alter only runs once.

The drupal_add_js function is additive.

Calling drupal_add_js to set the javascript variable for the label text twice turns the javascript label variable from a string to an array. When this is displayed on the button, the array is rendered twice, causing button label text duplication.

I've fixed this in the javascript file by changing this line:
fieldsetRepeater($('.webform-client-form'), '.webform-addmore', Drupal.settings.webform_addmore.label, 1);
to

    if (Drupal.settings.webform_addmore.label.constructor==Array) 
      fieldsetRepeater($('.webform-client-form'), '.webform-addmore', Drupal.settings.webform_addmore.label[0], 1);
    else
      fieldsetRepeater($('.webform-client-form'), '.webform-addmore', Drupal.settings.webform_addmore.label, 1);