Yeah, it's just that it never did this before a month or so ago.

Before:
I open the browser and load the forums, and every topic with new posts since I last visited is marked.

Now:
I open the browser and load the forums, and topics from only about the last 2 hours with new posts are marked.

All in all, it's not a very big deal; I've become used to it now. I just thought that maybe there was a simple solution.