It's possible that 6.1.2 also includes fixes for the passcode bug: https://forums.macrumors.com/posts/16872125/
I believe the front page news today stated that it actually didn't fix the passcode bug. It was likely rolled out quick to please enterprise clients
What versions works with iPhone 5?
6.1.1?
And where do I keep track of which version is compatible with the iPhone 5?
Sorry I'm not very clear in my head ATM .
All iOS 6 versions that can be run on the iPhone 5 can be jailbroken using evasi0n 1.4, when it is released.