For what it's worth, I was a beta tester as well.My system is similar your yours Frank. Windows 7 ultimate. 64 bit. 12 Gbyte ram and a 580GTX graphics card with 3head2Go - 3x24' monitors.I haven’t had the black screen occur on my system.Edit for spelling.
That really looks stunning. Great "Orbx style" work on the ground textures (and all seasons are included :( ). I've been following this blog for a while, and I'm standing in line for my copy when it's released.