UBB.threads PHP Forum Software Community Forums UBB.threads 6 Version 6 Support 6.5.4 - any way to change how topics with new posts are highlighted?

hmm, I see on these boards that are also running 6.5.4 that topics with new posts are being highlighted in a different color?

Can someone point out where the code lives that determines how to highlight the topics with new post so I can see what is awry on ours?

Thanks