For those who are using Ubuntu Jaunty, you will notice that there is a change in the way the system notifies you to upgrade software. In the past, an icon will appear on the system tray whenever there is new update available. In Ubuntu Jaunty, instead of showing the icon, the update manager will now pop up the window as and when it detects new update. While this is a good way to grab the user attention and get them to upgrade to the latest software version promptly, it can be pretty annoying...Luckily, you can turn off this pop up feature easily