In a week that saw a spate of Apple updates, the company's largest was Mac OS X 10.4.2, which incorporated a number of fixes to improve reliability and compatibility. As with earlier system updates, several built-in Apple applications were changed or replaced, such as Address Book, iCal, Safari, Mail, Automator, and Stickies. According to Apple's release notes, Core Graphics, Core Audio, and Core Image also gained updates, with updated ATI and Nvidia graphics drivers thrown in.
iChat sees improvements in video performance under certain circumstances, and can be set to log out of one computer automatically if you log in on another. Dashboard also gets a new feature, a Widgets widget that helps you manage your widgets; I know, that sounds like looking at a mirror in a mirror, but it's actually a widget that lets you activate or deactivate installed widgets, and optionally send third-party ones to the Trash. This update also includes a variety of AirPort-related updates, including WPA2 (Wi-Fi Protected Access version 2) support for AirPort Extreme Cards (described elsewhere in this issue).
Mac OS X 10.4.2 is available via Software Update as a 21.5 MB download when upgrading from version 10.4.1, or as a 57.5 MB download for a Combo Update when upgrading from version 10.4.0. You can also download stand-alone installers: a 44 MB update from 10.4.1, or a 58 MB combo update.