rem: var menuItem = document.getElementById(menuItemId);  if(menuItem) menuItem.setAttribute('label', customLabel); 
add: var menuItem = document.getElementById(menuItemId); if (menuItem) menuItem.setAttribute('label', customLabel); 
context: function SetMenuItemLabel(menuItemId, customLabel){    var menuItem = document.getElementById(menuItemId);    if(menuItem)        menuItem.setAttribute('label', customLabel);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/f61761febea1879c923efb684355ca9338b4f703/mailWindowOverlay.js/buggy/mailnews/base/resources/content/mailWindowOverlay.js