In the 'subscribed threads with new posts' listing under "settings", sometimes there is an extra icon to the right of the newest-unread arrow: I have seen a 'thumbs-up' icon in the past, and today I see a lightbulb.
I haven't been able to work out what these mean, and the alt-text is just "icon3"!
I haven't been able to work out what these mean, and the alt-text is just "icon3"!