Is My Gmail Hacked?

Any one has any idea what is this? I logged in my Gmail account and this is what I saw in the chat section in the right column. It is totally weird and very confusing. I don’t know anyone by name of Dr. Arthur then who is this fellow?
Funny thing was I signed out and logged back and things were back to normal.
Anyone has any answers? I will love to know what passed by in my Gmail account?

Does sounds like something fishy’s going on. Very much hacked into I’d vouch. Perhaps you should change your password and see if things gets back to normal. It’s really not comforting to know that someone might be using your a/c to send out unsolicited mails under your name.
as I said I logged out and then logged back in and the things were back to normal..?!?
even I am confused why this happened? When there are some highly technical people working behind GMail so how come we see such a glitch?
Oic. Guess it’s one of those X files thing going on. Now I feel insecure about my gmail account. Yeesh.