hello, there is another problem. I got mail from my site's user, concerning one of fraud ad.
"The add is in spanish (I'm from Spain) and imitates the page of the spanish police saying that the computer is blocked because of illegal downloads and asking for the payment of a fine. You can't close the window normally, it appears another window, so maybe you can get malware if you click inside of it. I've searched on the web and of course it isn't from the police, it's a fraud."
are you filtering and monitoring ads?