The first time I heard the story about the plans for German officers once the surrender happened was that Stalin wanted to summarily execute 50 thousand of them, Churchill was very angry about this idea and Roosevelt jokingly tried to diffuse the situation by saying, "Okay, how about 25 thousand?"
But I have now read that it wasn't Stalin who wanted the executions; it was Churchill. Frankly, the idea that Stalin wanted to do it makes a lot more sense from various standpoints.
I would like to know what is the generally accepted story among historians.