A news was revealed from the trusted sources that Apple is going to a new firmware iOS 4.0.2 for iPhone 4, 3GS, 3G and iPod touch to patch the PDF exploit in a few days. The new jailbereaking tool “JailbreakMe 2.0″ also use this PDF exploit to jailbreak all the idevices.
One suggestion for you that you can’t upgrade your phone to this upcoming iOS version. If you are conscious about security and privacy, can install this app PDF loading Warner that warns you before downloading any PDF file. The new iOS 4.0.2 has been released now without officially availability. There is nothing more in iOS 4.0.2 except PDF patch.