This problem has plagued every version since the first. Apparently, it has still not been fixed. The problem is that when you go to mouse over an item and there is supposed to be information in an intellisense/tooltip format, the tooltip does not display. So, you either have to forfeit your turn and do the action next turn (which breaks one's strategy - and puts you at a disadvantage), or restart the game. Saving/Reloading does not turn it back on. This has got to be one of the most common problems I have had in this game. Really annoying!