Quick, Simple Question

[rm2738]

I've been around this site for a while on and off, but I haven't figured out what the little flaming envelopes on the far left are, what do each of them mean??

 

[PatBateman]

I think they are for "hot topics" that have had a certain amount of replies already.

 

[Golden_Muscle]

scroll to the bottom of a board. It tells you.