iH8sn0w has just released Sn0wbreeze 2.2 R3 which comes with a fix for iBooks related issues on all iDevices jailbroken on iOS 4.2.1 with Sn0wbreeze 2.2 (R1 or R2). For those who don't know, Apple introduced a new check in iOS 4.2.1 which blocks all jailbroken iDevices from purchasing and reading any book via iBooks app.
If you will try to open any book though iBooks app, you will get the following error message:
There is a problem with the configuration of your iPhone, iPod Touch or iPad. Please restore with iTunes and reinstall iBooks.
If you do not want to restore your iPhone again with a custom IPSW made with Sn0wbreeze 2.2 R3, just download this DEB file and install it via iFile app. Alternatively you can download 'iBooks Fix' from Cydia but do not forget to add the Insanelyi source, http://repo.insanelyi.com before searching for 'iBooks Fix'.
If you haven't jailbroken your iPhone, iPod Touch or iPad yet and you are a Windows user, then you should go for Sn0wbreeze 2.2 R3 to jailbreak your device. Just follow the step-by-step guide here to jailbreak your iDevice on iOS 4.2.1 with Sn0wbreeze 2.2 R3 and then follow this guide to unlock your iPhone with Ultrasn0w 1.2.
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