hmm, it might have to do with the amount of slow-down (noticable or not) that occurs during that part of the game. see if it builds faster late in the game when there are very few units and players left After playing again, it seems that both unit and structure build time is longer after refinery. Speaking of the refinery, when the refinery is near the edge of the scrolling screen, the pad where the harvester unloads the spice has a few problems. When the refinery is at the bottom of the scrolling screen, a purple harvester appears there. When it is at the top and you scroll downwards, the patform slides with the screen fo a short time. Also, I noticed that when scrolling, a black rectangle flashes on the left side of the screen.