There's your profile picture (above) and your avatar, which is what is shown with posts. They can be different images - but I like recognizing people's posts by their avatars, and yours is sadly blank. :-)
It gets absurd, doesn't it? The one in the NLCB thread is a thorn in my side, because she spreads huge amounts of misinformation. I think you can see what her actual level of knowlege is.