8A294 sucks on my PB 15" 1.25GHz.
Anything relating to graphics is weird. Windows dragging (not resizing) is smooth, but delayed. I can drag a windows all around my screen quickly, and it'll go everywhere I drug it, but in it's own time.
Dock and expose are jerky. DVD player say no video device can be found
So as I said in the other thread...I'm going back to 10.3.x