[KingFish]

I would definitely disable "Automatic System Updates" and when Digi qualifies the latest OS X update, I'd ALWAYS use System update to "Manually" update everything EXCEPT OS X updates.

For Updating OS X (Once Digi Qualified) it's recommended to always go to Apple's site, and download the "COMBO" update and run the installer.

For example. When Digi DOES qualify 10.5.6 - go to apple's site, and type 10.5.6 Combo into their search engine.

Having said that, I AM running 10.5.6 - only because I bought a brand new machine, and didn't feel like re-formatting.

It SEEMS ok - but I won't update my other machines / rigs, till it's qualified.