The most popular iOS hacker known as @Planetbeing has finally fixed the problems with the DRM-protected iBooks.
He confirmed that a new patch has been packaged to the upcoming iOS 5.1.1 untethered jailbreak, that will allow you to open DRM-protected iBooks with your 5.1.1 jailbreak supported device.
The DRM patch will be started in background before loading your favorite DRM-protected iBook and the to jailbreak detection process will be bypassed. Few hours ago Pod2g has confirmed that DRM is successfully Patched:
|DRM protection patched on iOS 5.1.1|
iOS 5.1.1 Untethered Jailbreak — Release date
Аnyway, I think that iOS 5.1.1 Untethered jailbreak is too close. What do you think?