There is some inconsistency with the forum. On some of the Sub forums i select (like "General Sportbike Chat", if i select "Forum Tools", then "Mark This Forum Read" it instantly marks everything read and they become grayed out. If i do the same thing under "Open Forum" everything is marked read, but nothing is grayed out after. If I go back one directory i can see it actually worked, but the visual refresh is missing.
It is hit and miss with each of the Sub Forums. You might want to have a look through the code and correct that at some point.