Apple released an update of the operating system iOS 4.3.4

Apple has released an update of the operating system iOS 4.3.4, which fixes a security vulnerability related to viewing malicious files PDF.

This update applies to:

iPhone 4 (model GSM)
iPhone 3GS
iPad 2
iPad
iPod touch (4th generation)
iPod touch (3rd generation)
The update can be downloaded and installed with the software iTunes.