Refreshing the forum will rarely let me see new posts if I had read the thread earlier in the day.
I either close the IE window with FT on it, open a new IE window and reload FT. Or, I right-click on the thread, open it in a new window, then refresh.
It's an annoyance, and it seems like a problem that the admins of FT probably won't be able to solve (has to go directly to the software makers), so I'll live with it.
Cheers,
Lawrence