Virus in Yahoo mail ad

Hello,

While checking Yahoo mail today, I was barraged with several virus warnings almost every time I read an e-mail (all from different sources). From what I can tell… they seemed to come from a small ad box on the left side of the page (I included a screen capture, the ad box is circled in red).

The warning said the url in question was “uac.advertising.com/wrapper/aceUAC.htm

I just wondered if I have anything to worry about?

I’m getting this same thing in both yahoo and aol.com mail. It’s not even coming from opening mail, just opening the websites.

I’ve just been getting the same thing whilst logged into Statcounter. I get the warning after clicking on one of the menu options.

http://forum.avast.com/index.php?topic=74347.0