For a time now I am starting to experience the most awkward bug.
It started all like this. I was playing civilization 4 nicely and bug free until every time this would happen to me.
ex I was playing suddenly I could not fortify the unit with the icon panels. I had to use the commands. Then what happened the commands even didn’t work and I tried to refresh the game but when I restarted civ4 the game bug did not disappear.