RedSnow has again been updated with its Beta 4 version 0.9.10b4 available for download which intends to fix the iBooks issue which didn’t work on the previous untethered jailbroken iOS 5.0.1 devices which used Redsnow .
In-order to use this version, just rerun the tool over existing RedSnow jailbreak and all the bugs on the prvious jailbreak will get fixed.
Just to make things clear, Corona and RedSnow both works fine so it really doesn’t matter which tool you choose. If you have previously installed the Corona version, then there is no need to use this tool (unless you like RedSnow very much).
For those who haven’t jailbroken their device, please update to iOS 5.0.1 quickly(before Apple stops signing it) and use either the RedSnow or Corona jailbreak to get the job done. You would probably want the Redsnow solution of you are comfortable using your desktop to get the job done but if you don’t, you can always use Corona available from Cydia.
Without gurther ado, following are the links for download :-