I have seen in a few of my ToA 1.96 games(new to the game, haven't really played that many yet!) that the arrows on the end of the sliders in the window you use to adjust military, production, and research for your civ can get stuck.  If I recall correctly, it has usually been the middle slider, the production one. 

Anyway, the arrows on either side of the afflicted slider darken, as if they are greyed out, and you can no longer move the slider either by clicking the arrows or by dragging the slider along.  The other sliders/arrows work fine.  Saving and coming back from the main menu does not help.  Quitting the game entirely does give me my arrows/sliders back. 

Just a note FYI, Stardock.