Re: my conversation with Sook Tin, Hayden, Fred and that rather nice girl from Studio 2 this morning.
Do be careful how you define Postmodernism. It's not as simplistic as "All buildings built after 1945, or 67, or whatever". It's a loose movement with common design intentions that rebelled against the modern movement. Wikipedia's article on Postmodernist Architecture is a good place to set things in perspective.