The hits just keep coming! Apple has released another version of Quicktime this time around multiple vulnerabilities that may allow arbitrary code execution have been addressed. These include:

An unspecified handling error in the processing of Sorenson 3 video files.

An error in the processing of embedded Macintosh Resource records within QuickTime movies.

Parsing errors of malformed Image Descriptor (IDSC) atoms.

A boundary error in the processing of compressed PICT images.

We recommend that everyone upgrade to QuickTime 7.4
See Apple’s full advisory at:
http://docs.info.apple.com/article.html?artnum=307301