Since the Untethered Jailbreak for iOS 5.0.1 came into being we have seen two updates of Redsn0w in 2 consecutive days. Today it is the third update in third day. Every update of Redsn0w got some bugs fixed. Like the first version of Redsn0w 0.9.10b1 got the support of Untethered Jailbreak for iOS 5.0.1. In the second update it got some issues fixed for Cydia. Now in the third update it got Mobile-Substrate issues fixed. The issues were that when you used to run the new version on the previous Jailbreaked iDevice, it used to replace the Mobile-Substrate and cause conflicts with the new one and old one.
The official changelog is as follows:
Update #3: The b3 version of redsn0w fixes a problem where re-running redsn0w over an existing jailbreak would cause MobileSubstrate-based apps to stop running until MS was installed again. Now you can re-run the redsn0w jailbreak step without worrying about that (but still remember to de-select the “Install Cydia” option if it’s already installed).
you can download the Redsn0w new version from below:
Remember to uncheck Cydia in order to run the fix on previously Jailbroken iDevice.
This is not any new jailbreak. The Jailbreak for iPad 2 and iPhone 4S is in works and it will be out as soon as it is completed. So be patient.