For those of you new 10.5.3 updaters who are wondering what this Security Update 2008-03 is and why it isn’t popping up on Software Update, that’s because it isn’t meant for you, you greedy updater you.

You don’t need it, for one thing. Everything in it is already in the 10.5.3 update.

Actually, the Security Update is meant for pre-10.5.3 Leopard systems (10.5 to 10.5.2) and Tiger 10.4.11 users only. Mileage may vary, depending on your machine type and OS client, and can range from 72 to 118mb.

This security update is for those who want to wait out the potential hitches that can result from Leopard updates, like the few nasties that popped up from the 10.5.2 update last Feb., and for the folk who haven’t yet gone on to Leopard and are feeling abandoned in Tiger’s last iteration, yet still want to plug the security holes. If this applies to you, go get it here.

Just a quick heads-up.