Moving my warrior around the map, no terrain costs more than 1 movement.
I am able to move across rivers, forests, hills, everything, without penalty. Outside of my own territory.
v11 introduces a movement bonus along rivers. This is most likely what you're experiencing and that's not a bug.
Ah - OK. I had the same experience with crossing rivers - no terrain costs. I have terrain costs for hills if they are not next to a river, if they are next to a river - no costs.
Nazca lines and Artemis Wonders don't load their textures.
when i am trying to start a game, it says, texture error. what to do?
It's possible to develop your empire to the point where buying tiles actually pays you more money. Not sure exactly what the cause is, but it happens late game for me when I have at least 30 cities or so on the map and almost all are pretty well developed. I also tend to play on Settler and prefer the building up to the conquest.
It seems that discovering Natural Wonders doesn't add to happiness ...
Ahhh, I see. In the Vanilla version I believe you get a happiness bonus just by discovering them.
When I adopted Democracy I got something like 5 techs for free immediately and an additional one or two for free the next turn. I suspect something is not working right with the +25% to techs other civs know bonus. Is it applying +25% per other civ that knows it with no cap at 100%, so that widely known techs actually give you beakers?