In the latest build of the beta, when mousing over units, the entire screen changes color slightly to reflect the nature of the unit the mouse is touching.  For example, when you move over a friendly unit, the screen has a slight green tint, blue for your demigod and red for enemy units/buildings.  I assume this may be intended to make it easier to identify targets in a scrum of friendly/enemy units, but I find it to be very distracting.  It would be nice if there was a way to turn off this option.