Duplicate Wysiwyg

Hi,

I have a link that opens a dialog using the following code

        {include file="common/popupbox.tpl"
        id="edit-kb-question-{$content_question->question_id}"
        act="edit"
        opener_ajax_class="cm-ajax-force"
        link_text=$content_question->question
        href="bfa_knowledgebase.edit.question&question_id={$content_question->question_id}&kb_content_id={$kb_content->kb_content_id}"}
      

Clicking on the link opens a dialog with a WYSIWYG editor, defined by the following:

  
  
  
  
    
Question
Answer
{$question->answer}
{include file="buttons/save_changes.tpl" but_name="dispatch[`$dispatch`]" cancel_action="close" save=true}

Which all works fine. Until I close the dialog and reopen it. When I click on the link and launch the dialog again and the WYSIWYG editor is duplicated. I have had a look at the js/tygh/core.js file and I can see that destory is called before the dialog is closed, but it still duplicates.

Anyone experience this or have any thoughts?

Thanks...