dev team
The dev team provided a patch for the pdf vuln, without reversing the jailbroken status of an unlocked iphone. The patch was demonstrated as working when the user was directed to the jailbreakme web page to find they could no longer follow the same installation process they had before. Apple could have done this, but they also took the opportunity to kill the jailbreak as well, because they don't like people having unlocked iphones.