TinyUmbrella 6.10.03a has been released with the support for iOS 6.1.2. With TinyUmbrella v6.12.00 you can save SHSH Blobs for Latest iOS 6.1.2 and it is necessary to do that in order to utilize new Features. Saving SHSH Blobs could sometimes be the difference between having a jailbroken device and not. TinyUmbrella is a software that has the ability to save your SHSH blobs.
TinyUmbrella has been updated to work with iOS 6.1.2 on relevant devices. Make sure you don’t update to 6.1.3 when it drops. I wasn’t able to get 6.1.3 beta included (I just got too busy). But if you desire to keep your jailbreak, avoid 6.1.3 like the plague
Download TinyUmbrella v6.12.00 (Windows)
Download TinyUmbrella v6.12.00 (Mac OS X)