Redsn0w 0.9.9b6 to Jailbreak iOS 5 on Windows & Mac Released
To jailbreak iOS 5 tethered iPhone Dev team had released Redsn0w 0.9.9b5 which comes with preserve baseband option and supports iOS 5 IPSW however it was only available for Mac OS X. Today iPhone Dev Team has released Redsn0w 0.9.9b6 for Windows as well as Mac OS X. This version of Redsn0w also comes with several bug fix, including fix for iPhone 3GS owners having network crash when using Location Services in iOS5.
Another fix Redsn0w 0.9.9b6 has is cosmetic fix to the visual countdown you see when going into DFU mode. Users with already jailbroken iOS 5 needs to just rerun Redsn0w 0.9.9b6 and uncheck all the options during Redsn0w 0.9.9b6 jailbreak process.