This has been happening during the last few months.
I read a post. From start to finish. The post will be in light font, indicating I read the post. When I leave that forum, later return to the same forum, the post is in dark font again, implying that I never read it.
Under options, the mark all posts as read button does not work either -- for the topic or for the forum.
Suggestions for getting the posts to remain "read" and the unread meter to update?