While playing, i often have something going in the background. Lately, the last two weeks or so, when i alt+tab out to switch things, coming back in, the screen is faded to a whiter or grayer shade. It's ONLY the game, and it doesn't matter if i alt+tab back in or use the tray icon. Nothing i do, aside from exiting to desktop and restarting the game, seems to fix this.
Is anyone else having this issue?