Yesterday we told you about SHAtter and it will jailbreak all existing devices forever as it's a bootrom based jailbreak which acts on the hardware of the device. But unfortunately, there's a semi-confirm floating on the web today. p0sixninja may be sending a message to tell people that SHAtter is a tethered jailbreak (i.e. you will be required to connect your iOS device to your computer on every reboot).