Just tried to upgrade WordPress to 2.9, only to find I also needed to upgrade my MySQL database on the host server to MySQL5.0
Doing stuff like that isn’t intuitive and easy like most things on Mac. It involves running PHP scripts, which I have done before, but not often enough to remember how.
There’s always the scary possibility that you may delete or destroy everything, and it could be irreversible. (No CTRL-Z button!)
But it seems to have worked. While I’m still trying it out, please let me know if you spot anything funny.