I don't, I had this discussion with skybtc as well. I'm using Opera Browser with Opera Turbo. On your end you see Opera's IP. If you don't believe me, use a whois lookup with the IP you got on your end.
Whatever differed browser ip remains constant you are using more than one account and you know that very well
Dude I'm telling you I'm not. I'm on a mobile broadband because I'm on vacations and I'm using Opera Turbo. Want me to send you my IP right now?
Here. I'll try to login as well right now and you tell me what IP you see.