刚刚放出来，貌似没有什么变化
59M

The 10.5.4 Update is recommended for all users running Mac OS X Leopard and includes general operating system fixes that enhance the stability, compatibility and security of your Mac.

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.

Snow Leopard也不远了，Apple估摸着版本号足够使用了，反正10.4都能升到.11了