Yep, it’s time to upgrade your Quicktime media player to version 7.1 whether you’re a Windows OS or a Mac OS user (as long as you use Quicktime player).
This upgrade is released to fix security holes found in the media player. The upgrade fix security holes in viewing crafted images and movies (according to SANS). You may also read on the release notes for further details of the upgrade.
Meanwhile, while upgrading your Quicktime in your Mac OS, you should consider patching up your system with Apple’s Security Update 2006-003. Read on about the update here.
Visit Apple website for the Quicktime upgrade and Mac OS Security Update 2006-003.