rem: else { menuItem.setAttribute("hidden","true"); return false; } 
add:  menuItem.setAttribute("hidden","true"); return false; 
context: function IsGetNextNMessagesEnabled(){    var selectedFolders = GetSelectedMsgFolders();    var numFolders = selectedFolders.length;    if(numFolders !=1)        return false;    var folder = selectedFolders[0];    if (!folder)        return false;    var server = folder.server;    var serverType = server.type;    var menuItem = document.getElementById("menu_getnextnmsg");    if((serverType == "nntp")) {        var newsServer = server.QueryInterface(Components.interfaces.nsINntpIncomingServer);        var menuLabel = gMessengerBundle.getFormattedString("getNextNMessages",                                                            [ newsServer.maxArticles ]);        menuItem.setAttribute("label",menuLabel);        menuItem.removeAttribute("hidden");        return true;    }    else {        menuItem.setAttribute("hidden","true");        return false;    }}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/fb221e5950edc4e60407e96cd7460464d6878cdd/mailWindowOverlay.js/buggy/mail/base/content/mailWindowOverlay.js