I've enabled a feature where every 10 seconds the browser polls the server to see if you have any new alerts/conversations without having to refresh. If the server does find a new alert/conversation it will auto update the tab favicon with the number of new alerts and or update the page title with (x) x being the number of new alerts. This is similar to Facebook. It's very useful if you have a PF tab open and are off doing other things. Live Update will be enabled for all for a month to preview. After Dec 6th it will be for gold members only.