Apologies if this is actually listed somewhere. I have searched the site and cannot find any reference and although it's not critical, I'm intrigued.
Where all the topics are listed, regarding the icons on the left hand side of each topic, some animate, some not, some have a red border, some have an asterix, some have a padlock symbol (locked?) some have a lightbulb kind of thing going on - what do they all mean? Is there a legend or similar that can decipher these glyphs?