Well, whenever I load a savegame of the tutorial I can no longer built cavalry. This makes the game pretty much unplayable, because I lose thousands of men of infantry to even the puniest natives. (Even with hundrets of cannons in my armies!)
Note that I encountered this problem ONLY in the tutorial, but it gets way too hard this way.
Note that I encountered this problem ONLY in the tutorial, but it gets way too hard this way.