i have been using that feature very often since with my hectic workload; i dont have time to browse through each forum individually.
however the past 2 days have turned this "error" up:
No unread topics found since your last visit. Click here to try all unread topics.
i thought it was a server timeout or something, but it didnt work trying to refresh, so i just went to the "all unread topics" and viewed the posts with "Today" and "Yesterday" to be safe.