iPhone Dev Team has just released Redsn0w 0.9.8 beta 3 to jailbreak iOS 4.3.4 on iPhone 4, iPad 1, iPod Touch 3G and 4G and iPhone 3GS devices. This new beta release doesn’t support iPad 2 models.
As we have told earlier that iOS 4.3.4 only brings a security fix, so it is advised by iPhone Dev Team to all those users who want to keep their devices jailbreakable not to update to iOS 4.3.4.
Update #3: For the convenience of kernel hackers like @comex and @i0n1c, we have a new redsn0w 0.9.8b3 that supports a TETHERED jailbreak for iOS 4.3.4 on all devices that have 4.3.4 except the iPad2. The vast majority of people will want to stay back at 4.3.3 because that’s where the untethered jailbreak is! There are no new features in 4.3.4 — only fixes for jailbreak exploits.
Also, this is a good time to remind everyone (since we’re still seeing confusion about this): iPad2 owners with a baseband (3G or CDMA) cannot currently use saved blobs to go back to 4.3.3 once the signing window is closed. This is unlike every other device, so don’t be confused! iPad2 owners with basebands should stay away from all updates to maintain the jailbreak!
It is to be noted that Redsn0w 0.9.8 beta 3 provides tethered iOS 4.3.4 jailbreak on all supported devices, meaning you have connect your device with PC for successful start-up after every reboot.