View a thread in the Folding forum. An active one if possible.
Keep refreshing the page, and watch the "Currently Viewing" section.
Even though people are posting replies, that section does not update.
For it to actually show who is viewing the thread.
1) I've only noticed this in the Folding forum, but I've not been looking closely in other ones.
2) A recent release (I think 2 back, but maybe 3) had a fix which involved this bug in "certain" forums. It may be that the Folding forum was also affected, but not fixed.
Even though there have been a couple of dozen replies, each refresh shows the same people: