Apple has released updates for both Quicktime and iTunes. The updates are for the software on both Windows and OS X.
The Quicktime patch is a security update that patches two vulnerabilities. The vulnerabilities allow a malicious website to either run code on a computer or get infomation from a computer.
Apple also released an update to iTunes that adds support for DRM free music. It looks like Apple might just make their promise of DRM-free music available in iTunes by the end of May.
The updates will be pushed through Apple update or can be downloaded directly.