As it is, the icon beside the boards come in three shades: gray for boards with no new posts, full color for boards that have new posts, and a slightly lighter shaded icon for boards with itself has no new posts, but where there are new posts in a child board. Under certain light conditions, and especially now in the summer, I find it hard to see the difference between the latter two. The alt and title text is even the same. The alt/title text is probably coded into the forum software (or a translation pack), but it should be possible to make som greater distinction between new post on board itself and new posts in child boards only. Personally, I find it less necessary to differentiate no posts at all and new posts in child board only, since child boards have their own indicator for new posts.