I make extensive use of the Mark Selected Read function. I check everything off, and the topics that I want to read, but don't get a chance to, I unselect them as I page down, then when I get to the bottom click Mark Selected Read. However, it's not working as it used to anymore. Now it's marking all topics read. I've seen it a couple of times, and thought it was me, but I just verified this morning that I clicked the right button and had some topics un-selected.