This has probably been asked before, but I was too lazy to look beyond the first page:
What do all those different thread symbols mean? That is, the symbols to the left of each thread? There’s one that’s just a blue closed envelope, one that’s a blue closed envelope with lines coming out of it, a yellow open envelope, and an orange open envelope with a bunch of pages stuffed in it.
I assume they’re of the nature of “you haven’t read this thread since the last message”.