Update: Version 2.3.1 works around the OpenGL display driver bug found on Mountain Lion (10.8) that affects all Macs with Nvidia GPUs. The issue with Fractal Architect showing blank Preview windows is now fixed.
Update: Version 2.3.1 works around the OpenGL display driver bug found on Mountain Lion (10.8) that affects all Macs with Nvidia GPUs. The issue with Fractal Architect showing blank Preview windows is now fixed.