Chronic Dev-Team has just released GreenPois0n RC 6.1 for Windows and Mac OS X users. GreenPois0n RC 6.1 comes with Comex 'Hunnypot' iBooks fix. For those who don't know, Apple added a check in iOS 4.2.1 which blocked jailbroken iPhone, iPod Touch and iPad on iOS 4.2.1 from opening the iBooks app even if you have bought the books legitimately.
iDevices Supported by GreenPois0n RC 6.1:
- iPod Touch 2G (MC & MB)
- iPod Touch 3G
- iPod Touch 4G
- iPad 1G
- iPhone 3Gs (Old & New Bootrom)
- iPhone 4
- iPhone 4 Verizon
- AppleTV 2
If you have already jailbroken your iDevice on iOS 4.2.1 with GreenPois0n tool, you can re-run GreenPois0n RC 6.1 over it to fix the iBooks and Wifi related issues. Also if you have added any custom boot logo to your iDevice, GreenPois0n RC6 will not replace it.
Instructions to use GreenPois0n RC 6.1 are exactly similar to GreenPois0n RC5 for jailbreaking iOS 4.2.1 on iPhone, iPod Touch and iPad. Windows users can follow step-by-step guide here and Mac OS X users can follow step-by-step guide here to jailbreak their iDevices on iOS 4.2.1 with GreenPois0n RC 6.1.