Okay here's some good news for those guys who are waiting for iBook fix, as we all know since Apple released iOS 5.0.1 too many users are facing iBook problem, also we reported for you that @Pod2G the well known hacker who is working on A5 Untethered jailbreak that he is working on fixing iBook issues, today MuscleNerd has just announced on his Twitter account saying that he has just updated Redsn0w to version 0.9.10b4...

Too many users have been waiting for updating Redsn0w to fix iBooks issue, here's Musclenerd tweet:
The Dev Team goes on to say that like the update to Corona, the latest version of RedSn0w includes a fix for the sporadic launchctl issues as well. Now let us began downloading Redsn0w 0.9.10b4: