Mac OS X 10.5 Leopard may be on its last legs, but Apple has released a security update for QuickTime for Leopard, fixing 14 security flaws. All of them involve viewing maliciously crafted images, videos or web sites, or playing certain types of audio files. QuickTime 7.7 for Leopard is a 69 MB download, and is available via Software Update, or from Apple’s Support Downloads page.
Full information about the update is available here.