Official update/factory reset? Or you misread the error code, because that one is the most straightforward of all: sigcheck failure, which pretty much always means no jailbreak.
EDIT: The only other (very unlikely) possibility is a very specifically corrupted package, and I just double-checked, this one's ok.
Last edited by NiLuJe; 04-19-2014 at 11:44 AM.
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