Fix Push Notifications on iPhone following Jailbreak

So supposedly during the activation process on an iPhone when using iTunes, it certifies something that allows you to get Push notifications from Apple servers. This can go awry in "hacktivated" phones, but it also went wrong with my iPhone 4 when using AT&T, 4.2.1 legit and subsequently greenpois0n jailbroken. Anyway, PushDoctor fixed it nice and easy

http://www.cmdshft.ipwn.me/blog/?p=481