I installed iOS 4.3.4 this evening and of course I wanted to check if the latest version of redsn0w for iOS 4 still works without problems with the new version of the operating system. To my surprise, I found that redsn0w does not jailbreak iOS 4.3.4 for iPhone 4, but puts the terminal in Recovery Mode from where it cannot be booted, not even tethered. I don't know what Apple changed in the new version of the operating system, but the Dev Team will have to update redsn0w for iOS 4.3.4, otherwise we won't even be able to do a tethered jailbreak on our terminals.
I didn't try to jailbreak the iPhone 3GS, but the situation is probably the same because the exploit and the injection method are the same. If you are thinking of installing iOS 4.3.4, I recommend that you postpone the update for now, but only if you want to jailbreak. If you don't need a jailbreak on your terminal, then you can quietly install iOS 4.3.4.
