“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!”
iPad 2 users can’t get jailbreak iOS 4.3.4 so keep your iPad 2 to 4.3.3. If you have upgraded your iPad 2 to 4.3.4, you are out of luck for now. iPhone, iPod Touch and iPad 1 users are also advised to keep on iOS 4.3.3 as MuscleNerd tweeted on his twitter account that users should stay back to 4.3.3.
You can navigate to our jailbreaking section for more information.