Thanks for posting that, merc. I am in the exact same boat. I read all of the reviews on apple.com about it not working in Tiger, but for me it worked fine. There were a few quirks (online didn't work) but it looked great, and played great.
Now after upgrading to Leopard it appears to have the same issue that others reported in Tiger (and you reported). For some reason Leopard broke it, hopefully EA is right and that Apple is working on some type of patch right now. It would be nice to be able to play it again soon.