Let me look into that for you. I don't remember how I did it. It was so long ago. Ha ha!
Also, the new posts are still impossible to see. I noticed the text bolds slightly, but not nearly enough to be able to tell the difference.
The Feedback forum is the one with the unread post. Can barely tell the difference between that and the others.
Also, when you go into that forum, there is nothing to distinguish (at least from what I can tell) which post is actually unread.
And when uploading files, the Thumbnail, Full Image button is completely unreadable unless you hover over it.
I'm sure all those things can be changed in the style.