Out of interest, do any Greeks refer to the capital of both the Byzantine and Ottoman empires as Istanbul, and likewise do any Turks refer to it as Constantinople? Do any Greeks get insulted by people calling it "Istanbul", and do any Turks find "Constantinople / Konstantinopoli" insulting? Personally I usually would say both names, even in conversation.
Also, although the origins of Constantinople are obvious, where did Istanbul come from? Was it, as I have heard (possibly here), from "i styn poli" (to the city), or elsewhere?