Finally Apple released update 10.5.5 yesterday. Features of 10.5.5 include Apple’s recent security updates, Addressbook bugfixes and lots of other fixes (read all details here). To sum things up: Apple recommends to apply this update as soon as possible. And yes we will obey.

All genuine Mac users can safely update. There are no reports about problems. You may do so using the Software Update App.

OSX86 user may wait some days, we are just examining the steps. Most likely best thing is to download the Combo Update from here and use our instructions here. People report broken audio drivers on ALC883 chipsets (AppleHDA patcher solved this). We’ll get back to you once we checked out all the details.