Pop-ups, pop-unders and any window that opens without being given permission is never a good idea. Remember the early days of
the internet? This kind of annoying window behavior is unacceptable.


Prior to Ubuntu 9.04, an icon would appear in the notification area, indicating that new system updates were able to be installed. Only after clicking the notification icon would the update manager window appear.
In Ubuntu 9.04 the update-manager behavior was changed. It no longer uses the the notification area to let users know that updates are available. Now Ubuntu auto launches the the update manager window to let user know that software updates are available.

What is the point of having a notification area if you aren't going to use it? Even though the update window does not steal focus or stop workflow, it still launches without permission. I find this behavior annoying and contrary to creating a good user interface. Update notifications belong in the notification area. This is one of the new changes in Jaunty that I can't agree with. The good thing is, like everything else in Ubuntu, if you don't like it you can change it.
To stop the update manager window from auto launching and enabling the notification icon in a terminal type:
gconftool -s --type bool /apps/update-notifier/auto_launch false

- Now when system updates are available the icon appears and Jaunty's beautiful notification system tell you how many updates are available. I think this is a much better way of handling a very important system function. It integrates into the operating system better and gives me back control of my system.