I have installed the 1.5b version of TTW. I started OA and every time I get in the pod to start the simulation the game just ctd's on me. Not sure if anyone else is experiencing this phenomenon or not but it is a bug and I'm reporting it. :)
So to be exact. I get in the pod. It closes nicely. The light show goes off and my screen turns white. a small delay then I get the "This program has stopped working" message and I'm back on my desktop.
It may or may not be relevant but I am running Windows 8 Release preview atm.