You know, the first time they screwed him up, in New Titans in 1991 was when he got destroyed by the Wilderbeests, rebuilt by the Soviets without his memory, and by the time the story arc was over, they had to retcon it to post-Soviet Russia! DC got screwed over by real world politics. Idiotic move to have storylines set there in 1991. I don't know when he went back to normal, but I know it was quite a while as the Titans book was retooled a few months later.