Ok down the bottom of posts.
And in any of the topics or folders.
You can see a guide for the topic icons.
[attachimg=1]
But what are these then?
[attachimg=2]
[attachimg=3]
Aliens ?
Hehehe, those are the icons for default forum layout versus the one we use!
Unmodified parts from default one refer to their set of icons, while the (modified) parts from current layout refers to its own.
This Chapter of the Great Phantom Icon Mistery is solved :)
P.S. No alien icon was harmed during this post :-*