notis.user.js

// ==UserScript==
// @name          Notis taringa
// @namespace     http://www.taringa.net/maag-
// @description	  fixeo de notificaciones bug v6
// @author        Maag
// @include       http://taringa.net/*
// @include       https://taringa.net/*
// @include       http://*.taringa.net/*
// @include       https://*.taringa.net/*
// @run-at        document-start
// @version       1
// ==/UserScript==
(function() {var css = [
	"#page ~ *:not(.ui-widget-overlay), #page ~ *:not(.ui-dialog), #page ~ *:not(.ui-widget) {",
	"position: fixed;",
	"}"
].join("\n");
if (typeof GM_addStyle != "undefined") {
	GM_addStyle(css);
} else if (typeof PRO_addStyle != "undefined") {
	PRO_addStyle(css);
} else if (typeof addStyle != "undefined") {
	addStyle(css);
} else {
	var node = document.createElement("style");
	node.type = "text/css";
	node.appendChild(document.createTextNode(css));
	var heads = document.getElementsByTagName("head");
	if (heads.length > 0) {
		heads[0].appendChild(node); 
	} else {
		// no head yet, stick it whereever
		document.documentElement.appendChild(node);
	}
}
})();

Puedes agregarle que emitan un sonido tipo facebook