Apple today released Leopard update version 10.5.4.  Today's update prepares the OS for the MobileMe Service .  It also fixes a number of bugs including:

General

• Includes recent Apple security updates.

• Resolves an issue with saving and reopening Adobe Creative Suite 3 files on a remote server.

• Includes additional RAW image support for several cameras.

• Addresses an issue that may result in a partially installed X11 application.

• Improves L2TP VPN client reliability.

AirPort

• Addresses AirPort reliability issues with 5GHz networks.

• Addresses AirPort issues that may result in slower performance in Logic Studio or MainStage.

iCal

• Improves overall iCal reliability for meeting requests, cancellation notices, delegation, and syncing with iPhone.

• Resolves an issue that prevents deleting an iCal event without notifying the creator.

• Addresses an issue in which events in all calendars affect availability.  A checkbox now enables information-only calendars to be transparent from free/busy lookups.

• Resolves a UI issue preventing delegated calendars from showing up as a separate window.

• Addresses an issue with copying and pasting attendees from one event to another.

• Resolves an issue in which iCal may not delete events after a specified time interval, even when set to do so in iCal preferences.

• Addresses an issue in which To Dos cannot be marked private.

Safari

• Addresses a potential performance issue when loading secure web pages.

• Resolves issues that may be encountered when accessing secure web pages with client certificates that reside on a smart card.

Spaces and Exposé

• Addresses an issue in which switching from a space with a Finder window keeps the Finder as the active application instead of the application residing in the destination space.

• Fixes an issue in which dragging an application from the list of application assignments in Spaces System Preferences does not assign the application to the desired space.

• Resolves an Exposé issue that may result in only a subset of windows being shown.