iPhone Dev-Team has just released Redsn0w 0.9.7 beta 4 with a major change as the reds0w no longer requires you to install and run a separate program for the usbmux which caused a lot of confusion with the jailbreak process.

Just a quick heads up! Redsn0w 0.9.7 beta was out yesterday to bring untethered jailbreak for iOS 4.2.1 but some of our readers has reported that usbmuxd process  is not working with them. Also Windows users were left behind and couldn't convert their devices to untethered jailbreak.