Just out of curiosity, what constitutes an active topic as listed at the top of the Board index? How does the drop down box for the past x days factor into the equation? When I look back 1 year, there are active topics with as few as 0, first posted 9 months ago and no responses, listed as the only 0 response topic in the past year and still qualifying as an active topic.
I clicked on the link to unanswered topics, and there are 112 topics that have never had any responses in the past 365 days. I decided it's an innocuous software hiccup.