It appears that Apple has fixed the crappy drivers that had hamstrung the 12" GeForce FX Go5200 graphics card. I'd just bought Homeworld 2 a few days ago, and it didn't work at all, totally unplayable. Fortunately, the day I was going to post it on eBay, Apple released the update, and now it plays beautifully on the highest settings. Not sure why they had to wait so long to fix a problem that didn't exist under 10.3, but I'm glad they finally got around to it.