Those who rely on the ultrasn0w carrier unlock should avoid Using the redsn0w and continues as usual.
Download Redsn0w 0.9.6rc13
Here are the download links :-
The Dev Team made a minor adjustment to Redsn0w rc13, temporarily making it a tethered jailbreak for iPhone 4 while they resolve a bug. Other iOS devices are not affected by this change.
If you’re having problems updating to iOS 4.3.2 using Cydia and sauriks’ server, you may have recently used the Error 3194 fix for iTunes, which means you just need to remove gs.apple.com from your hosts file.