According to the folks over at MacinTouch, Mac OS X 10.3.8 has been released which addresses the following issues:
Addresses an issue with Mac OS X 10.3.7 in which iChat, Mail, or other network-based applications could take a long time to open.
Addresses an issue in which a computer wouldn't always restart automatically after a power failure, even when the Energy Saver preference option "Restart automatically after a power failure" was selected.
Improves DVD Player compatibility when playing a movie (using certain ATI Radeon cards) to an external widescreen TV with a 16:9 aspect ratio.
Resolves an issue in which a "flicker" could be seen when navigating DVD menus in DVD Player on certain PowerBook G4 computers.
Addresses an issue in which a PowerBook G4 computer would, on rare occasion, wake from sleep with a black screen and not respond to any keyboard, mouse, or trackpad input.
Addresses "jumping cursor" issues that might occur when using your portable computer's trackpad with your thumb, side of thumb, or a "flat" finger.
Resolves an issue on certain Power Mac G5 computers where a fan cycles erratically at unexpected times, such as when Seti@home software is running.
Addresses an issue that could prevent clients using the Active Directory plugin from binding to their Active Directory server.
According to both Slashdot and MacinTouch, this includes security updates but I couldn't find additional details on the Apple site or the security page at: http://docs.info.apple.com/article.html?artnum=300667. Perhaps it's just a rollup of their security patch released on 1/25?