Yesterday we told you that RedSn0w was updated to version 0.9.10b2 to fix an error with the launchctl extension that effected the way certain Cydia tweaks ran and installed. With the launchctl extension working with the iOS 5.0.1 Untethered Jailbreak after first re-running RedSn0w over you existing Jailbreak, all errors were thought to be fixed. It looks like, however, that when you ran RedSn0w 0.9.10b2 over your existing Jailbreak it caused an error with MobileSubstrate (an extremely crucial extension library that all Cydia tweaks rely on). Thus, the iPhone Dev-Team have released RedSn0w 0.9.10b3 to fix this error with MobileSubstrate.
If you would like to fix the MobileSubstrate error present on your iPhone, iPod Touch or iPad Jailbroken on the iOS 5.0.1 firmware untethered with RedSn0w 0.9.10b2. You can either reinstall MobileSubstrate from Cydia or download RedSn0w 0.9.10b3 and Re-Jailbreak your iOS device by running RedSn0w once again (make sure you deselect the install Cydia option).
If you are interested in downloading RedSn0w 0.9.10b3 you can download it from the iJailbreak Downloads Section. Additionally you can use one of the download links below:
Download RedSnow 0.9.10b3 for Mac OS X
Download RedSnow 0.9.10b3 for Windows
If you have any questions or thoughts about RedSn0w 0.9.10b3 or MobileSubstrate errors please leave them in the comments section below…