iOS 4.2.1 jailbreak available with redsn0w 0.9.6b4

If you're waiting for a jailbreak before updating to iOS 4.2.1, you might be happy to know that redsn0w 0.9.6b4 will do the trick. It uses the Limera1n exploit that worked with iOS 4.1, however this is currently a "tethered" jailbreak. In other words, once you jailbreak using the current method, if you ever need to reboot your iPad, fourth-gen and third-gen iPod touch, iPhone 3GS (later models) or iPhone 4, you must have the device connected to your computer and use redsn0w to do the reboot, otherwise the phone simply won't boot up. Definitely not something we'd feel comfortable doing with our main device, but hey, we know there are many out there who are more daring than we are. If that's you, go for it and let us know how it went!

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