Apple released iOS 4.3 GM couple of days back after iPad 2 launch event. iOS 4.3 final version will be released on 11th March. Notcom the creator of Tinyumbrella has just released an updated version of Tinyumbrella which will now saves SHSH blobs for iOS 4.3 GM for iPhone 4, iPhone 3GS, iPod Touch 4G, 3G & iPad.. Tinyumbrella is now updated to version 4.21.13.
SHSH Blobs for iOS 4.3 GM are important as they might be important in future iOS 4.3 untethered jailbreaks. As previously iOS 4.2.1 untethered Jailbreak needed iOS 4.2.1 beta 2 SHSH hashes for untethered Jailbreak.