You may want to go back to the previous one, but can you?
By Tony Bove You should always keep your i Pod updated with new versions of the software that controls the device — which is i OS for the i Pod touch, or the i Pod system software for an i Pod classic, i Pod nano, and i Pod shuffle.
To see which version of the i Pod system software is installed on an i Pod nano or i Pod classic, choose Settings→General→About from the i Pod nano Home screen or Settings→About from the i Pod classic main menu.
Next to the word is information that describes the software version installed.
By Tony Bove The best way to stay updated with the latest version of i Tunes and i Pod software is to download upgrades over the Internet and install them.
Apple updates i Tunes and the built-in i Pod software regularly to add new features and fix bugs.
If you need to do this, sync your i Pod with i Tunes first to create a backup of all your data.