In the game of Apple versus the jailbreakers, Cupertino threw the community a curveball with iOS 5's newly restricted downgrade system which blocks devices from restoring to old 5.x firmware. With the help of his noble steed iFaith (a custom Windows tool), hacker iH8sn0w has found a way around the firmware block, making it possible for dumped iOS 5 signature hash blobs (SHSH blobs) to permit unsigned restores. Why all the fuss about downgrading to prohibited firmware? Prominent iOS hackers MuscleNerd and pod2g have stated that the first untethered jailbreak will arrive on iOS 5.
