"Dan, he can't leave a buyer negative feedback, that has all changed. He can not leave you bad tidings in a "green donut" either. Leave it and go on."

Technically, you are correct. However, there is a way to get around that. I've left negative comments contained in a positive feedback regarding a deadbeat bidder who refused to honor his bid. Simply click on leave positive feedback and insert the words "blocked this dead-beat bidder from future bidding"