A problem that has always been there is working with or trying to avoid coordinate systems. I will get two drawings that overlay perfectly using X-refs but one will be way out of scale in MapGuide.
MapGuide tried to deal with this by using Arbritrary X-Y coords. FM is generally not concerned with Coord. sys., and usually will have none assigned in Map/LDD if they have either. I can change to a state-plane setting in Map but what about the person using ADT?