Roommates 1.0.1: In the load screen and in the save screen there is a save marked in green color. This save does not switch to yellow if it is chosen (either below the mouse-cursor or chosen by the arrow-keys). As it does not change color, navigating by keys is a bit more difficult.
Edit: There is also something in the options-screen, though that is only cosmetic: If you move the cursor over "seen text" or "all, the whole field goes yellow. If you go over "window" or "fullscreen", only the yellow letters become a bit brighter.