The components of the update as listed on Apple’s support page:
- Upgrades Safari to version 4.0.2.
- Improves the accuracy of full history search in Safari 4.
- Resolves an issue in which certain resolutions might not appear in the Display pane in System Preferences.
- Dragging an Aperture image into Automator now invokes an Aperture action instead of incorrectly invoking an iPhoto action.
- Resolves an issue that could prevent importing of large photo and movie files from digital cameras.
- Improves overall Bluetooth reliability with external devices, USB webcams and printers.
- Addresses an issue that could cause extended startup times.
- Improves iCal reliability with MobileMe Sync and CalDav.
- Addresses data reliability issues with iDisk and MobileMe.
- Improves overall reliability with AFP.
- Improves overall reliability with Managed Client.
- Improves compatibility and reliability for joining AirPort networks.
- Improves Sync Service reliability.
- Includes additional RAW image support for several third-party cameras.
- Improves compatibility with some external USB hard drives.
- Includes latest security fixes.
The update is a 165MB download for Intel Macs, and can be accessed through Software Update, or through Apple’s Support site.