rem: if (useShortView && displayName) emailAddressNode.setAttribute("label", displayName); else emailAddressNode.setAttribute("label", fullAddress); 
add: if (useShortView && displayName) { emailAddressNode.setAttribute("label", displayName); emailAddressNode.setAttribute("tooltiptext", emailAddress); } else { emailAddressNode.setAttribute("label", fullAddress); emailAddressNode.removeAttribute("tooltiptext"); } 
context: function updateEmailAddressNode(emailAddressNode, emailAddress, fullAddress, displayName, useShortView){  if (useShortView && displayName)    emailAddressNode.setAttribute("label", displayName);    else    emailAddressNode.setAttribute("label", fullAddress);      emailAddressNode.setTextAttribute("emailAddress", emailAddress);  emailAddressNode.setTextAttribute("fullAddress", fullAddress);    emailAddressNode.setTextAttribute("displayName", displayName);      if (this.AddExtraAddressProcessing != undefined)    AddExtraAddressProcessing(emailAddress, emailAddressNode);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/0432f92328febd7c344f6b05bec985cf9033e10e/msgHdrViewOverlay.js/buggy/mailnews/base/resources/content/msgHdrViewOverlay.js