The latest update to PwnageTool from the iPhone Dev-Team is now available to download, and version 4.2 brings with it untethered jailbreaking for devices running iOS 4.2.1 and fixes the recently discovered iBooks issue that prevents a user opening an iBookstore purchase on their jailbroken device.

PwnageTool uses the “feedface” untether developed by the Chronic Dev Team to allow for untethered jailbreaking in the latest release, and supports all 4.2.1 devices other than the iPod touch 2G. Another issue fixed in this version is the Wi-Fi problem that some users had with the second-generation AppleTV.

If you’ve already jailbroken your device and you’re desperate to gain access to your iBookstore purchases, don’t think you need to restore and jailbreak again with the latest version of PwnageTool. On their blog, the iPhone Dev-Team have stated that fixes for both the iBooks issue, and the Wi-Fi issue for AppleTV, will be available in an upcoming Cydia package that you’ll simply be able to download and install on your device.

Once again that’s iOS jailbreakers 1, Apple nil.

The recently released Greenpois0n jailbreak tool has been updated to release candidate 6 today, and this particular version will allow you to jailbreak your second-generation AppleTV and install the popular NitoTV software, adding a few great new features to your device.

The process is exactly the same as that used for release candidate 5, and just as before, this will provide an untethered jailbreak for all devices, meaning you won’t need to plug them in to your computer when you want to boot them.

Greenpois0n RC6 is available for both Mac and Windows, and you can download it now from here.

The Chronic Dev Team has released an updated version of its Greenpois0n utility that allows you to jailbreak your favorite iOS devices running iOS 4.2.1. The good news about this new release is that the utility will perform an untethered jailbreak, which means you can reboot the device without having to have it tethered to your computer.

This version is new and I haven’t tested it myself yet, but from what I am hearing there may be a few problems with the utility so you might want to wait a while before using it.

Greenpois0n is currently only available for the Mac and it isn’t recommended for people who have unlocked iDevices or are interested in unlocking.

You can download a copy at the developers site or via this link.

[via iClarified]

Apple previously claimed the flaky proximity sensor in the iPhone 4 had been fixed by the iOS 4.1 update. But there was mounting evidence that the proximity sensor wasn’t fixed at all.

Shortly after the release of iOS 4.1 iPhone user Ryan Bell performed a series of comprehensive tests using Apple’s iPhone configuration utility, and came to the conclusion that iOS 4.1 doesn’t fix the proximity sensor.

The proximity sensor problems were being blamed on software bugs, relocation of the proximity sensor due to the addition of the front facing camera, or greasy ear canals.

Today is the day. Finally. Apple is shipping iOS 4.2 to iPads, the iPhone 3G, 3GS and 4, and second, third and fourth generation iPod touches. iPad users have the most to benefit since they will be getting app folder enhancements and multitasking for the first time. The update also includes Game Center, AirPlay and AirPrint for all devices. Find My iPhone, iPad, or iPod touch is now free to use without a MobileMe subscription and you can now rent TV episodes directly on your iPad.

The update should be available for downloading around 10:00 AM PST today. You’ll need the latest copy of iTunes (version 10.1) so make sure your Mac is up-to-date. Afterwards tether your iOS device to your Mac and check for updates in iTunes after the appointed time.

Check out Apple’s press release for complete details on this exciting new iOS release.