I´ve seen many doing the mistake by closing the jailbroken iPod and doesnt know how to reboot it without recover it. The downgrade process is easy and doesn´t take long. Step one: go into <REMOVED> and download the iPod touch firmware 3.1.2 2G! WARNING: you must take 2G version. Step two: press recover on iTunes while you hold the shift when you connected the USB into the PC/MAC Step three: choose the 3.1.2 2G and press recover. Now check if you got the right firmware by going in to: settings>general>about.