Apple has released iOS 4.3.4 build 8K2 for iPhone, iPod Touch and iPad. This release fixes the PDF bug used in JailbreakMe 3.0 so the users who want to keep untethered jailbreak should not update to iOS 4.3.4. Here’s the excerpt from a support article published by Apple:

Impact: Viewing a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution

Description: A buffer overflow exists in FreeType’s handling of TrueType fonts. Viewing a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution.

You can read more about it here: http://support.apple.com/kb/HT4802

If you want to download iOS 4.3.4, here are direct download links:

Download iOS 4.3.4 IPSW

iPad 2 WiFi: iPad2,1_4.3.4_8K2_Restore.ipsw

iPad 2 CDMA: iPad2,3_4.3.4_8K2_Restore.ipsw

iPad 2 GSM: iPad2,2_4.3.4_8K2_Restore.ipsw

iPad 1: iPad1,1_4.3.4_8K2_Restore.ipsw

iPhone 4: iPhone3,1_4.3.4_8K2_Restore.ipsw

iPhone 3GS: iPhone2,1_4.3.4_8K2_Restore.ipsw

iPod Touch 4G: iPod4,1_4.3.4_8K2_Restore.ipsw

iPod Touch 3G: iPod3,1_4.3.4_8K2_Restore.ipsw