It's back. When I open Minion, and once an ad loads in the corner, I receive the UAC Prompt asking permission for the Internet Explorer Add-on Installer.
In a previous post (
http://wowinterface.com/forums/showthread.php?t=31523), I think it helped to have a screenshot of which ad was giving me a problem. In this case, the ads are for Red Baron Pizza and Assurance Wireless. I didn't get a screenshot of the Red Baron ad, but I'm attaching a screenshot of the Assurance Wireless ad.
I believe some of these ads are definitely trying to install something in IE, and possibly a security risk. Hope this helps the devs in some way.