Apple released another update to Leopard this afternoon, bringing the current version up to Mac OS X 10.5.8. The update comes chock full of improvements to various parts of the OS as well as security fixes, and is available as a 165MB download via Software Update.

The support doc attached to the 10.5.8 release says that it upgrades Safari to version 4.0.2 and improves the accuracy of full history search within the browser. It also fixes a problem where some screen resolutions weren't showing up in the Display pane of System prefs, improves "overall Bluetooth reliability," and addresses a mysterious, unnamed issue that "could cause extended startup times." Additionally, iCal reliability with MobileMe Sync and CalDev has been improved as well as AFP and Managed Client reliability, to name a few.

10.5.8 also comes with a handful of security fixes that, as of this writing, have yet to be posted to Apple's security site. They were, however, detailed on Apple's security listserv; some of the highlights include four ImageIO fixes for maliciously crafted OpenEXR images, EXIF data, and PNG images.

Another interesting fix is related to the Dock that now blocks someone with physical access to the machine from using four-finger multi-touch gestures while the computer is in locked screen saver mode. MobileMe logouts also got some love—someone with a local user account can no longer access various parts of your MobileMe account after you have logged out.

The update isn't much of a surprise, as Apple has been seeding builds of 10.5.8 to developers for several months now. The next question is how much higher Leopard's version numbers will go as we continue to race towards the 10.6 Snow Leopard release this fall.

Update: For you Tiger users out there, the security updates are available for you via Software Update as well.