Longtime Mac user, balking at the price of an MB Air, so I bought a 10v on ebay and went to work. Hmmm...
some hick-ups (hangs, no wifi, no sound etc)
re-install of 10.6.0
still hick-ups, just a tad less
forum search - found solutions (e.g. sequence of running NIB and OS updates)
re-installed 10.6.0, then last night 10.6.2
Bingo. So far it works fine, including sound and wifi.
Currently repairing permissions – never ever took so long on any of my Macs, I have to tell you, currently running a bit over 80 minutes – and then off to 10.6.5 or 10.6.7, depending on which one seems most stable.
I am always baffled how the combined knowledge on a forum such as this fine one and the willingness to share can make life so much easier.
For that, a big Thank You to all of you here.