I have only an idea how webbugs work, but it seems everybody says OP is using tor, including theymos. However, I thought registration on this forum through tor was not permitted, so theymos should have OP's real IP address from that - though IIRC, molecular used a VPN-through-tor to register for his "findmeifyoucan" thread - can you confirm molecular?
confirmed. I used a vps I had bought with bitcoins and tunneled my traffic through it:
my real IP -> tor -> vps -> bitcointalk