@Nitro_R: My point, exactly. I never changed my gamma settings for MWLL, monitor or ingame alike, so I pretty sure it's 0.2.0 related.
@Xarg: I do use darker gamma settings for some games, Thief or Deus Ex for example, to get more atmospheric look, but such solution isn't suitable for multiplayer games, as it only changes what I see, but not what other players see. Visibility reduction due to darker environment at night has powerful influence on battle tactics, so now, in 0.2.0, we have that influence of day/night cycle on gameplay gone, as night is only slightly darker than day.