As expected, Apple released the lastest update for OS X Snow Leopard. I typically recommed using the Combo updater, as I have always had better success, but the standard update is available in Software Update under your Apple Menu.

As per Apple:

The 10.6.3 Update is recommended for all users running Mac OS X Snow Leopard and includes general operating system fixes that enhance the stability, compatibility, and security of your Mac, including fixes that:

• improve the reliability and compatibility of QuickTime X
• address compatibility issues with OpenGL-based applications
• address an issue that causes background message colors to display incorrectly in Mail
• resolve an issue that prevented files with the # or & characters in their names from opening in Rosetta applications
• resolve an issue that prevented files from copying to Windows file servers
• improve performance of Logic Pro 9 and Main Stage 2 when running in 64-bit mode
• improve sleep and wake reliability when using Bonjour wake on demand
• address a color issue in iMovie with HD content
• improve printing reliability
• resolve issues with recurring events in iCal when connected to an Exchange server
• improve the reliability of 3rd party USB input devices
• fix glowing, stuck, or dark pixels when viewing video from the iMac (Late 2009) built-in iSight camera

For detailed information on this update, please visit this website:http://support.apple.com/kb/HT4014.

For information on the security content of this update, please visit:http://support.apple.com/kb/HT1222.