add: gSMIMEContainer.removeAttribute('collapsed'); 
context:   signedStatus: function(aValidSignature)  {    if (aValidSignature)    {      gSignedUINode.removeAttribute('collapsed');    }    else    {      // show a broken signature icon....    }    gSignedUIVisible = true;  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/50c518f821dedc0b19b17ee05c91b0057b6f6bdd/msgHdrViewSMIMEOverlay.js/buggy/mailnews/extensions/smime/resources/content/msgHdrViewSMIMEOverlay.js