I have a weird bug that every time I try to build a ride with a lot of scenery, I can build it, but as I move it for placement throughout the park, the "possible" white image remains for some of it. I can save the game and reload it and the white disappears. However, then the ride has missing pieces of scenery. I use a Mac and have tried deleting the application and application support and redownloading the newest and previous versions, but it still occurs. Just began today when I downloaded the newest update though.