There are also a few security patches in the release, such as a CoreAudio fix to guard against maliciously crafted MP4 files, an ImageIO patch that ...
... the battery level monitor on the device and security patches to guard against malicious MP4 and TIFF files it brings with it bad news for jail breakers. ...
A patch for the OpenSSL network encryption system has also been included as a preventative measure to guard against a known man-in-the-middle vulnerability ...