This is a fresh install of rF2. I am able to duplicate a CTD when switching from the Skip Barber mod to the Historic F3 car when I remain in the game and simply change cars. This does not occur when I leave the game, restart and select the F3 car. Interestingly, this observed failure does not occur when switching from the Historic F3 car to the Skip Barber. I first noticed this anomaly at the Aintree track, and was able to duplicate it at the historic Belgium. I have not taken time to search or experiment further... I have been driving the Build 382 since it was released, and have noted no other significant anomalies.