RedSn0w has been updated to 0.9.7 beta4. Is the release usbmuxd eliminates the requirement to unravel his escape from prison.
Unfortunately, this version remains only for Mac and can only be used by people with 4.2b3 iOS SHSH drops safe. A Windows version will be released soon. It is rumored that the next beta version.
The fourth beta is already available (testers ONLY please!). From this version, redsn0w no longer required to install and run a separate program for usbmux (it was a non-trivial for many). It is well to keep that program running if you use ssh anyway. I think we have fixed a race condition in the graphical user interface that was causing redsn0w of an accident during the “Development of Monte JB Files ” step. Nothing has changed in the next iPhone (where the main problems remain only Bluetooth and Skype).