I'm having trouble reading the posts against the black background. If it's just me, don't worry about it. I can manage. If other people are having trouble as well, you might want to change it to a friendlier color. I know you need good contrast between the letters and the background, and I know that white against black is very high contrast, but somehow, it doesn't work well for me.
I guess I should add that I love the forums, and thank you.