It's displaying (only on the one board) as though I'm zoomed in like 2-3x, though I can't zoom in or out.

Sorry.

The issue is with long, unbroken strings (like lolololololololol) that can't be moved to a new line. As of now, that forces the forum to stretch to accommodate the topic title. If you check out pages 2 through maybe 4 then you'll see it do the same thing, I'd wager.