Jailbreak app PwnageTool was updated a few minutes ago to include untethered jailbreak for iOS 4.2.1 and clear the iBooks incompatibilities found in version 1.2.1 of the ebook reading app. The Dev Team explains:
PwnageTool also includes two very recent improvements to the 4.2.1 JB: iBooks was just fixed by @comex and @pushfix last night so that it works as intended on DRMed books, and the wifi problem on AppleTV 2G was fixed by @nitotv, @DHowett, and @saurik. Both of these fixes will also be available in upcoming Cydia package updates, so if you’re already jailbroken you can wait for those updates rather than restore and jailbreak again.
PwnageTool 4.2 can jailbreak the following devices:
- iPhone3G
- iPhone3GS
- iPhone4
- iPhone4 - Verizon
- iPod touch 3G
- iPod touch 4G
- iPad
- AppleTV 2G
The app is available for download on the Dev Team’s blog.