I’m sure I’m the only one who doesn’t know this, but I’ll ask anyway since you’re sworn to fight ignorance. And I am ignorant.
The little red envelopes mean “New Posts”
The little grey envelopes mean “No New Posts”
So… new posts since when? Since I last visited the site even though I didn’t click on the thread? Did I just answer my own question?
What do the little blue arrows mean next to some Subject lines?