Apple Released OSX 10.5.5 Update

Apple released the 10.5.5 update last night.
What's included?

General

• Includes recent Apple security updates.
• Addresses stability issues with video playback, processor core idling, and remote disc sharing for MacBook Air.
• Addresses an issue in which some Macs could unexpectedly power on at the same time each day.
• Resolves a stability issue in TextEdit that could be found when accessing the color palette.
• Improves Spotlight indexing performance.
• Fixes an issue in which contacts might not sync properly with PalmOS-based devices.
• Improves iPhone sync reliability with iCal and Address Book.
• Includes improvements to Active Directory (see this article for more information).
• Improves Speech Dictionary.
• Fixes Kerberos authentication issues for Mac OS X 10.5 clients that connect to certain Samba servers, such as Mac OS X Server version 10.4.
• Includes extensive graphics enhancements.

Mail

• Addresses performance issues related to displaying IMAP messages.
• Resolves an issue with SMTP settings for AIM, Compuserve, Hanmail, Yahoo!, and Time Warner Road Runner email accounts.
• Addresses stability issues that may occur when dragging a file to the Mail icon in the Dock.
• Addresses an issue with the "Organized by Thread" view in which the date does not appear when the thread is collapsed.
• Resolves an issue in which RSS feeds could temporarily disappear from the sidebar.
• Improves Mail robustness when sending messages.
• Improves reliability when saving drafts that have attachments.

Time Machine

• Improves Time Machine reliability with Time Capsule.
• Addresses performance issues that may affect initial and in-progress backups.
• Fixes an issue in which an incorrect alert message could appear stating that a backup volume does not have enough free space.
• Time Machine can now back up iPhone backups that are on your Mac, as well as other items in (~/Library/Application Support).

And much, much more.