That's very close, the one on www.koivet.com looks like yours except the character has shoes on and is on it's side... Access the above site and reply to any post and you'll see it on the icon bar...
I personally think it is someone from a another board mocking the folks on this one, probably going back over there insulting our intelligence and having a childish laugh.
I did about pond building, him wanting me to help him...with a lot of leading questions...specifically about pond designs I don't advocate because his dad's "friend" builds ponds. I suggested he ask his dad's friend to teach him. I also had some IM's from a friend of his "Khaku".
He got my AIM name from my koiphen profile and started IMing me. I told him several times it was inappropriate to IM me before I finally blocked him. Never did answer any of the questions. I've smelled a rat on this one for a while now - the best was when he used a different name to post a response to himself, trash talking and insulting... himself. Brian quickly sniffed that one out - both posts came from the same IP!