No Identifying Data Fetched error in redsn0w during iOS 5 jailbreak

The problem arises if redsn0w can’t access Apple’s server to get the appropriate IPSW.

The solution? Simply specify the IPSW for redsn0w after you’ve downloaded it (from Apple or your favourite uber-reliable jailbreaky site). Of course, make sure (duh!) to select the right device…