“RESTING IN SUNNY FLORIDA, I was Running Opera on a nephew’s system, specifically ver 7.03 US - the adware version. I didn’t mind ignoring the ads too much, and even occasionally clicked on a few to feed the clikthru hungry bannerati. Lo and behold, without entering any voluntary location data, and always entering such info in a dodgy fashion when it was a “required field”, the banner ads started getting personal, or at least - local, advertising businesses very close by. It seemed as if the browser might be feeding back URL lists, or perhaps, gasp, form field content, or XML. Naw… I thought - not Opera. I like those folks, and have recommended it to so many.”

I think this answer direct from Opera answers it all…