The only way I can keep up is with the "What's New?" button on top. I go through all the ones that interest me like any one that has WUD in it.
Once I go through all those I click the "Mark threads as read" and they sets it back to zero. Next time I log back in I go back to the what's new button. Actually I have a shortcut for the forum that I use that carries me directly to new posts. http://nikonites.com/search.php?do=getnew&contenttype=vBForum_Post
Did you select medium?
View attachment 36274
If you don't see this option try opening the my photos window, right click, reload.