Windows Phone 8.1 may still be a month away from its official debut, but the rumor mill is making the wait easier today by leaking some new details of the update. The latest Windows Phone 8.1 leak claims to be screenshots that show the update’s Start screen with custom images. It’s said that WP8.1 will have a setting that, when toggled, will allow the user to make the Live Tiles transparent and use a custom image as the background for the tiles.