Meaning of Symbols

[EAGERBEAVER]

What does a small black mark on a post symbol mean? Where are such markings defined?

 

[garsh]

In the list of topics?
Those are the topics where you yourself have posted something.

If you click this link, every result will have one of those marks:
http://www.mynissanleaf.com/search.php?search_id=egosearch" onclick="window.open(this.href);return false;