Since the launch of Beta 3, the space where the unit graphics used to be is a black, blank space, beginning in the "Who are you?" screen before you start a game. I use a laptop with Win7 64Bit, Duo CPU and 4 GB Ram.
Additionally, the GUI has always felt really sluggish and unwieldy to me, beginning at the "Who are you?" screen. Perhaps it is an oversight on my part, but i have yet to find a way to tone the graphics down in order to make interaction with the GUI swift and smooth.