Nvidia driver 302.17 was released on Jun 15, with many improvements, bug fixes and new features.

Read more about nvidia 302.17

This tutorials will explain you how to install this new driver on Ubuntu 12.04, 11.10, 11.04 and 10.04 using PPA.

Open up a terminal from the dash home(or press Ctrl+Alt+T), add the ppa:ubuntu-x-swat/x-updates to your repository by this command:

sudo add-apt-repository ppa:ubuntu-x-swat/x-updates

Then update and install the driver:

sudo apt-get update
sudo apt-get install nvidia-current nvidia-settings