Just yesterday, Redsn0w 0.9.9b2 was released and today we already have an update. Dev-Team has just pushed Redsn0w 0.9.9b3 for Mac and Redsn0w 0.9.9b3a for Windows with ability to auto-detect iOS 5 GM firmware for all supported devices. Even though it is a tethered jailbreak, the newer Redsn0w makes the tethered-boot process a lot easier with automatically detecting the iOS firmware for connected jailbroken device and uses cached .IPSW for tethered boot.
Here are the official release notes:
Update #11: redsn0w has been updated to 0.9.9b3 to auto-detect iOS 5 GM firmware. Remember: it’s still tethered for all devices except for iPhone 3GS with old bootrom. If you don’t use redsn0w to “Just boot” at power up, all jailbreak apps (and even some native ones like MobileSafari) will fail to launch.
If you already jailbroke the GM by pointing an older redsn0w at the beta7 IPSW, there’s no need to re-run the full jailbreak step again…just use this newer one to make the tethered boot easier
Update #11a: We’ve replaced the Windows version of 0.9.9b3 with 0.9.9b3a. The new version fixes a caching bug that affected only Windows users — point it one more time at your iOS 5 GM IPSW, and from then on you won’t have to point at it again.
As a special bonus to Windows users, we’ve made it so that if you make a copy of redsn0w.exe and name it something like “justboot.exe” (anything with the word “boot” in it), it will start up in “Just Boot tethered” mode. That way you don’t have to click on any buttons at all to boot tethered!
You can download Redsn0w 0.9.9b3 via the following official links: