Mac OS X 10.5.3, a massive update weighing in at well over 400MB and containing even more changes than 10.5.2 (itself sporting the largest changelist in Apple software update history) has been released along with a separate package for Tiger users containing only the relevant security updates.
Coming almost exactly when predicted by the grapevine, 10.5.3 and these Tiger Security Updates are packed to the gills with fixes and new functionality that many readers have been clamoring for since before Leopard had even shipped….
From the 10.5.3 release notes (http://support.apple.com/kb/HT1141):
General
*Fixes a font issue that could result in Helvetica Narrow being used in applications instead of Helvetica.
*Addresses an issue with stuttering video and audio playback in certain USB devices. Read more
Apple posts hidden link to iPhone 2.0 software!
If you would like to be one of the few to sneak in behind an unpublished link and download the iPhone 2.0 firmware a day early, you need merely click here! (225MB)
To use the package once it has been downloaded (using the command-line curl or ftp utils, or another downloading application which won’t auto-expand the file after download, is recommended), simply option-click on the “Check for Update” button in iTunes, and select the file.
The update will wipe all data from your phone, so it is wise to ensure that all your bookmarks et cetera are backed up. It is not generally possible to specifically backup/restore your Home Screen icons, so be prepared to start from scratch in that regard. Read more