iPhone Dev team has pushed an update to Redsn0w jailbreaking utility making it to the version 0.9.12 beta 2 which includes several bug fixes including a new addon for injecting Rocky racoon on limera1n-able devices.
If you iOs device is already jailbroken, there is no need to jailbreak it again. You can download Redsn0w 0.9.12b2 from iPhone dev team's blog.
“Update #1: Starting with version 0.9.12b2, redsn0w will now explicitly ask users with limera1n-able devices whether they want to inject rocky-racoon using the DFU ramdisk method, ro the backup/restore method (the ramdisk method is better for those with lots of media on their device that would create very large backups, and it’s required for those with unactivated iPhones). If you’ll always want to use limera1n, you can select that in the Preferences pane. It also fixes an iBooks issue an old-bootrom 3GS iPhones, and provides more useful error messages when things go wrong.”
If you iOs device is already jailbroken, there is no need to jailbreak it again. You can download Redsn0w 0.9.12b2 from iPhone dev team's blog.




