Apple has released Mac OS X 10.6.5. You can obtain it via the Software Updates component of the Mac OS X System Preferences app. According to Apple, the update:
° Improves reliability with Microsoft Exchange servers.
° Addresses performance of some image-processing operations in iPhoto and Aperture.
° Addresses stability and performance of graphics applications and games.
° Resolves a delay between print jobs.
° Addresses a printing issue for some HP printers connected to an AirPort Extreme.
° Resolves an issue when dragging contacts from Address Book to iCal.
° Addresses an issue in which dragging an item from a stack causes the Dock to not automatically hide.
° Resolves an issue in which Wikipedia information may not display correctly in Dictionary.
° Improves performance of MainStage on certain Macs.
° Resolves spacing issues with OpenType fonts.
° Improves reliability with some Bluetooth braille displays.
° Resolves a VoiceOver issue when browsing some websites with Safari 5.
° Improves Bluetooth pairing with Magic Trackpad.
° Resolves performance issues with third-party displays that use InstaPort technology.
° Adds SL support for transferring files with iDisk.
° Resolves an issue when opening 4-up Photo Booth pictures in Preview.
° Addresses keyboard responsiveness issues in the Dock when Spaces is turned on.
° Resolves an issue syncing Address Book with Google.
° Fixes an issue when replying to a Mail message sent by a person whose name contains certain characters such as é or ü.
° Improves performance for users bound to an Active Directory domain.
° Improves reliability of Ethernet connections.
° Systems with a Mac Pro RAID Card (Early 2009) installed can now be put to sleep. For more information, see Mac Pro RAID Card (Early 2009): Enabling system sleep.
° Improves reliability of fibre channel connections, resolving a potential Xsan volume availability issue.
° Adds RAW image compatibility for additional digital cameras.
° Security improvements.
This update also includes the improvements found in the Mac OS X v10.6.1, 10.6.2, 10.6.3, and 10.6.4 updates.