" CommentAuthorcrawle CommentTime2 minutes ago quote
As far as I know, the ppf-Updates for the images are only compatibility-Updates. So if your system's working fine, you don't need the newest version of your image. As regards Apple System-Updates, there are guys like eddie, who release a Hack-Upgrade, which you can try on a test system (split your partition and clone it) and use it if it works on your main-system.

-crawle "

I agree that if the system is solid stable, dont mess w/ it. Tough to do at times though as it's nice to have the most up to date version. I have actually cloned my install like you suggested. I twould be nice though to be able to transfer settings, apps etc when upgrading.