Snow Leopard latest update, 10.6.2 is available for download through software update.
Here’s the full changelog:
The 10.6.2 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 for:
an issue that might cause your system to logout unexpectedly;
a graphics distortion in Safari Top Sites;
Spotlight search results not showing Exchange contacts;
a problem that prevented authenticating as an administrative user;
issues when using NTFS and WebDAV file servers;
the reliability of menu extras;
an issue with the 4-finger swipe gesture;
an issue that causes Mail to quit unexpectedly when setting up an Exchange server;
Address Book becoming unresponsive when editing;
a problem adding images to contacts in Address Book;
an issue that prevented opening files downloaded from the Internet;
Safari plug-in reliability;
general reliability improvements for iWork, iLife, Aperture, Final Cut Studio, MobileMe, and iDisk;
an issue that caused data to be deleted when using a guest account;
And it’s a 500 MB update. Finally, Apple.