On Wednesday, Apple released Security Update 2010-007, which patches a critical security flaw in Mac OS X Leopard. The update is approximately 241 MB and contains numerous security patches, including an updated version of Adobe's Flash Player plug-in. Note that this security update is for Mac OS X 10.5 Leopard, an older version of OS X; if you're running Mac OS X 10.6 Snow Leopard, this update does not apply to you.
If you're still running Mac OS X Leopard, fire up Software Update and grab this security update, or you can follow these links for updates for the client version and server version.
