What sort of security warning is it? Can you try and copy it down here please?
I didn't get a "Security warning" per se .. but yesterday when I went to the G&O a pop-up came on my screen asking if I wanted to continue to a website with these user details:
Username: 5197776686
Server: msg.telus.com
Google says its apparently a number in Ontario, Canada
Any clue what that was all about (F.L.A.M.E.R.) ?