Really nothing important but I noticed that on the side of posts, next to the date to be specific, there is a circle that appears when the post is unread – of course this is normal and expected behaviour – when you hover your cursor over it you see the ‘Post is unread’ tooltip appear.
Once the post has been read and you go back to the same place where the ‘unread circle’ appeared, the tooltip still displays. Like so:
I also double-checked to ensure it wasn’t anything with another forum, it can also be reproduced here.