Single Security Fix in Mac OS X 10.6.6 Update
Apple has released Mac OS X 10.6.6, a 115 MB update whose main new feature is the Mac App Store, where Mac users can buy software as easily as from iTunes for iOS devices. In this update, there is a single security fix, which affects Software Update: A format string issue exists in PackageKit’s handling [...]
http://blog.intego.com/2011/01/06/single-security-fix-in-mac-os-x-10-6-6-update/