I generally read the various forums on this site by clicking the "Show unread posts since last visit" link at the upper right. While I'm likely then to ignore posts in the Capture 1 forum, since I don't use it, I find interesting stuff in pretty much all the others, from time to time.
It's very useful. But it's not infallible. I may go directly into a particular forum and see lots of "new"-flagged threads which haven't show up in my "unread posts" list. Occasionally, I get a message saying that there are no new posts since my last visit, which is simply wrong.
So, what is a visit? More particularly, while I can see easily how a visit starts, how, and in particular when, does it end? I'm permanently logged in, if that makes any difference; I read the site on two Macs (Safari on both); and I always close the window (or navigate elsewhere in the same window) when I've finished reading.
Just curious, really.
Jeremy