Save Your SHSH's NOW
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.
Enjoy!
TinyUmbrella [OSX]
TinyUmbrella [WIN]