Here is the story of the two new exploits discovered for the iOS 6 jailbreak

  Week Pod2G bragged on Twitter that he discovered, together with planetbeing, two new vulnerabilities in iOS 6. Unfortunately, we found out then that these vulnerabilities, although good, are not enough to allow hackers to launch the untethered jailbreak for iOS 6. Reason? Hackers have not yet managed to find a second set of vulnerabilities for the initial jailbreak injection code. They have a number of vulnerabilities for this procedure, but they need duplicates because they don't want to give them to the Apple Lossless Audio CODEC (ALAC), the chance to close the original ones.

pod2g discovered a vulnerability and told me about it and I tried to integrate it into my existing jailbreak code to replace one of the ones we don't want to burn. I discovered I couldn't get him to work due to some miscommunication, but in the process of trying to get him to work, I discovered a new vulnerability for doing the same thing. I did get THAT one to work and it's now integrated with the rest. Unfortunately, as pod2g says, neither bug has to do with initial code injection, which we currently don't have a duplicate/backup vulnerability for at all.

  Basically, the hackers want to have two complete jailbreak solutions and they will release only one of them, the other one will be used in the future to discover other vulnerabilities in iOS.