In the LBN column on the Latest Discussion page, the titles don't change color to indicate I've read them . . . [View all]

The titles change color in Latest Discussions, and they do on the LBN page, but not in the right hand column on the Latest Discussion page. There, the LBN titles are black, and remain so even after I've clicked through to read them.

Have I missed a setting, or perhaps this is a glitch in my browser (Safari on a desktop Mac)?

Would really like to see this column have the same attributes it had in DU3.

Thanks.