add: gSMIMEContainer.removeAttribute('collapsed'); 
context:   signedStatus: function(aValidSignature)  {    if (aValidSignature)    {      gSignedUINode.removeAttribute('collapsed');    }    else    {      // show a broken signature icon....    }    gSignedUIVisible = true;  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/1a5cd1307efa744cb0a758fa8632553b47a01993/msgHdrViewSMIMEOverlay.js/clean/mailnews/extensions/smime/resources/content/msgHdrViewSMIMEOverlay.js