Feisty feature of the day #20 - Universe and Multiverse on tap
Since the beginning of time, Ubuntu's Universe (community maintained packages) and Multiverse (packages with legal issues or proprietary bits) software repositories have been optional. While this protected users from installing software which could not be supported directly by the Ubuntu team, it also meant that accessing the vast collection of useful packages in the two repositories was that little bit more difficult.
Well, as of Ubuntu Feisty, Universe and Multiverse are enabled by default.
If you like, you can disable them by going to System -> Administration -> Software Sources. Click the Ubuntu Software tab and untick the universe and multiverse repositories.