After problems with iPhone activation servers, company Apple Lossless Audio CODEC (ALAC), last night he also had problems with the servers that check the ipsws to be used for restoring through iTunes. Seems like quite a few users they did it either save SHSHs for iOS 6.x, or restore to a version that allows them to jailbreak with the help evasi0n. Apple randomly signed SHSHs for iOS 6.x – iOS 6.1.x, so anyone who was awake in the middle of the night could benefit from the problem.
Unfortunately this morning it was solved and probably won't come back soon.
