Hi John
I have the same machine you have and after upgrading to 10.2.8 I got a nasty issue with QMaster (which comes with either DVD SP or FCP). My machine just
began to hang with every CPU intensive Task or died once in an hour.
The machine was so reliable for over 3 years now and suddenly 'something' got
it broken.
The only thing I remember was that I installed the upgrade from 10.2.6 to 10.2.8 when the issue appeared. So my only solution was to disable QMaster
startup in my Account Preferences. The system went stable again but it's not
a solution when QMaster is a needed service by DVD SP or FCP.
I can't say it was 10.2.8 alone, but I had FCP 3.0.4 FCP 4.5 HD and DVD SP 3 installed.
A week ago I switched to Tiger, and everything works fine, although I now just
installed Final Cut Studio.
Hope this little info helps.
cheers
Sandro
PS: never change a running system! True if you're on a Mac too!