Rolling the security changes in Mac OS X 10.7.3 Lion back into 10.6 Snow Leopard, Apple has released Security Update 2012-001 and Security Update 2012-001 Server, both exclusively for Snow Leopard. The fixes relate to vulnerabilities in Apache, ATS, ColorSync, CoreAudio, CoreMedia, CoreText, curl, dovecot, filecmds, ImageIO, libresolv, libsecurity, OpenGL, PHP, QuickTime, SquirrelMail, Subversion, Tomcat, and X11. Plus, Mac OS X will no longer trust SSL/TLS certificates issued by DigiCert Malaysia, which has issued certificates with weak keys that it cannot revoke. The 1.0 versions of these releases caused crashes with PowerPC-based programs running under Rosetta; the 1.1 releases resolved those problems. (Free, 192.73 MB/212.09 MB for Snow Leopard/Snow Leopard Server)
Keyboard-based Dock Navigation
If you're a fan of keyboard shortcuts and navigation, you may want try accessing the Dock from your keyboard. Press Control-F3 to enter the Dock's keyboard access mode. Then you can press a letter corresponding with an item's name to select it; press Return to open it, Command-Q to quit the selected application, or Escape to exit keyboard access mode. You can also use the arrow keys, Tab key, and other keyboard navigation keys to toggle between the Dock items.
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Security Update 2012-001 v1.1 (Snow Leopard)
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Special thanks to Phillip Bussey, Michael Conlon, Norm Corriveau, and
Paul Taylor for their generous support!
The v1.1 update to the Security Update should resolve the problem.