Leopard ...

[samsc]

Careful with Leopard and x1900, they don´t go along well. My system started freezing from out of nowhere. Took some time to figure out why, as I´d put in some more RAM etc. But hopefully the machine is cured with clean fans and a clean 10.4...

leopard has terrible performance- 10.5.1 is a dog.

only use if you have to. otherwise steer clear for now.

there really is nothing at all worth upgrading for.