iPhone Dev Team has released a new version of redsn0w, version 0.9.10 beta 5 to fix critical iBooks issue with jailbroken devices. Redsn0w beta 5 is now available and can be applied through a patch or fix. A member of the Dev Team said that in 10% of cases iBooks does not display content protected by copyright but the new version of redsn0w solve this problem. Unfortunately an update to Corona was not released so you have to use redsn0w patch to implement.
Update # 5: redsn0w version incorporates b5 Yet Another fix for iBooks, this time involving DRM. @ Planetbeing wrote a utility Called "crazeles" that overcomes iBooks jailbreak detection by about 10% That Would Cause of images to show incorrectly. This fix is similar to the "hunnypot" That fixed 4.x @ COMEX wrote for the jailbreak. As usual, you CAN choose to install the fixed either by re-running redsn0w over your Existing jailbreak (de-select Cydia if you do that), or by Installing the corona package from Cydia (it’s the Same set of files no matter Which Way you choose).
You can use redsn0w iOS any iDevice compatible with 5.0.1, except iPad iPhone 2 and 4S. To implement the patch just run and uncheck all the boxes (including the Install Cydia).
Download Redsn0w 0.9.10b5: