Meaning of Icons

[FryBoy]

I noticed that some of the icons to the left of thread titles are red, others are blue. I can't make any sense out of it -- what's it all mean?

 

[FryBoy]

Never mind -- I found the Rosetta Stone for the icons. It's at the bottom of the page IF you are in a specific forum. I usually go to New Posts, which covers all forums, and it doesn't appear there.