This update delivers several improvements for both PowerPC- and Intel-based Macs (as well as improvements provided in the Mac OS X 10.5.1 update.)

• Addresses issues which could hinder or prevent binding Mac OS X 10.5.x clients to Active Directory domains.
  

• Improves connection reliability and stability
• Includes 802.1X improvements.
• Resolves certain kernel panics.
  

• Adds support for more third-party routers, as detailed in this article.

• Improves performance of certain Apple Dashboard widgets (such as Dictionary).
• Addresses an issue in which Dashboard widgets may no longer be accessible after switching to or from an account that has Parental Controls enabled.
  

• Updates Stacks with a List view option, a Folder view option, and an updated background for Grid view.
  

• Addresses legibility issues with the menu bar with an option to turn off transparency in Desktop & Screen Saver preferences.
• Adjusts menus to be slightly-less translucent overall.

• Improves iCal so that it accurately reflects responses to recurring meetings.
• Addresses an issue in which a meeting may remain on the calendar after being cancelled.
• Addresses stability issues related to .Mac syncing of iCal calendars.
• Resolves an intermittent issue in which editing an event with attendees would cause the event to shrink and not register that the event was updated.

• Addresses an issue with simultaneously-logged in accounts in which iChat sounds generated from one account might be heard in another account.
• Fixes an issue in which iChat idle time is affected by Time Machine backups.
• Improves connectivity when running iChat behind a router that doesn’t preserve ports.
• Enables logged chats from previous versions of iChat to open faster and more reliably.
• Addresses an issue with text chats in which users may be unable to receive messages from the sender.
• Addresses an issue that may prevent rejoining an AIM chat room without reopening iChat.
• Addresses video chat compatibility issues with AIM 6 and third-party routers.
• Fixes an issue with case-sensitivity of AIM handles.

• Adds support for Samsung D600E and D900i phones.
  

• Addresses an issue in which Finder could unexpectedly quit when displaying folder contents in Column view.
• Addresses an issue in which Finder could unexpectedly quit when accessing Users and Groups in a Get Info pane.
• Resolves an issue that prevented setting permissions on a folder alias.
• Resolves an issue in which the Eject command could write to a disc in the optical drive.
• Fixes an issue in which the scroll bar might disappear when deleting a file within a folder that includes files that are out of view.
• Fixes an issue in the Sharing & Permissions section of Get Info windows, in which the gear icon appears to be gray/disabled after authentication.
• Addresses an issue in which the Show Icon Preview preference might not be not saved when turning it off.
• Fixes an issue that could occur when trying to print an image from the Finder.
  

• Addresses an issue with Message menu's Mark > As Read choice.
• Fixes an issue in which duplicate On My Mac folders may appear in the sidebar after upgrading to Leopard.
• Improves the accuracy of the Data Detectors feature.
• Resolves an issue with scrolling through a Note that is displayed using the split view in the message window.
• Fixes an issue with deleting messages located in the Drafts folder.
• Fixes an issue in which dragging the icon in the Safari URL field into a Mail message creates an attachment instead of a link.
• Addresses an issue found when opening a item in the Notes folder that is not a Note.
• Fixes an issue that may prevent RSS feeds from being delivered in Mail.
• Resolves an issue in which a selected message could "flash" from blue to gray when in Organize by Thread mode.
• Fixes an issue with scrolling between multiple To Dos in an email message.
• Fixes an issue in which the body of email messages with certain MIME structures may not be displayed.
• Improves performance with America Online (AOL) account-based messages in Mail.
• Addresses issues with some ISPs during automatic set-up in Mail.
• Addresses an issue in which Mail might not send mail on some networks to some SMTP servers.
• Mail now automatically disables the (unsupported) third-party plugin GrowlMail version 1.1.2 or earlier to avoid issues.
• Adds an option to view large icons in the Mailbox list.
  

• Addresses a hanging issue that may occur when connecting to an AFP network volume.

• Improves stability when opening the Parental Controls System Preferences pane.
• Fixes an issue that may prevent changes to the email address for permission requests.
• Addresses an issue with printer administration for a guest account enabled with Parental Controls.
• Addresses an issue with setting printer administration privileges from another Mac on the local network.
• Fixes an issue that could prevent certain applications from being allowed.
• Addresses accuracy issues with the web content filter.
  

• Improves stability when scrolling through a PDF document.
• Fixes an issue that prevents tabbing within a PDF document after clicking on the PDF.
• Improves the Mail Document feature so that email attachments are more reliably created from Print Preview.
  

• Addresses an issue in which remote printers may be deleted when the computer is put to sleep.
• Improves printing performance when using some Microsoft Office applications.
• Resolves an issue with some printing options, such as landscape orientation, number of copies, two-sided printing, and so forth that may not have functioned with some printers shared by Microsoft Windows.
• Adds support for certain printers connected to the USB port of an AirPort Extreme or AirPort Express base station.
• Resolves a stalling issue that could occur when installing certain Canon printing software from a disc.
  

• Adds RAW image support for several cameras, as detailed in this article.
  

• Addresses issues with Safari reliably resolving certain domains.

• Addresses an issue in which Setup Assistant could unexpectedly appear each time Mac OS X 10.5 starts up.
• Improves stability and performance during log in.
  

• Improves the accuracy of the grammar checker.
• The computer will now shut down if an automatic disk repair does not succeed during startup.
  

• Adds a menu bar option for accessing Time Machine features (the menu extra can be enabled in Time Machine preferences).
• Improves backup reliability when computer name contains slash or non-ASCII characters.
• Fixes an issue in which the backup disk displayed in the Finder may be out of sync with the disk chosen for Time Machine.
• Addresses issues in which some external drives are not recognized by Time Machine.
• The status menu now appears by default.
  

• Improves general stability when running third-party applications.
• Addresses an issue in which the incorrect search results may be displayed for certain Automator Find/Filter actions.
• Addresses an issue with the Latvian and Russian keyboard layouts.
• Addresses an issue in which the backlight could turn off before Energy Saver's backlight setting.