advice on upgrading to Mac OS X 10.4.9

I just did the 10.4.9 upgrade on my 15″MacBook Pro (Core Duo, 2GHz), with no unusual behavior or problems. I downloaded the Combo updater and used it for the upgrade, even though I was already running 10.4.8. I made full clones to two different external drives with SuperDuper! beforehand, and I also ran OnyX’s automated housekeeping functions. The RAM in this machine is Apple factory-installed, and I chose good music for the update: Copland’s Appalachian Spring. I think a lot of upgrade problems result from playing inappropriate music during the process. Eric Bergman