10.4.1 is now available. Includes updated gfx drivers.
OK so far...........

It was mostly a bug fix update, though I think that the updated graphics drivers improved performance a little bit on my 12" Powerbook. I can manage to turn on shaders and leave texture resolution at high. Stations are a bit choppy, but normal gameplay is fine. Rglow still makes everything too slow for normal use, but it's fun to turn on to see the pretty colors.