Recently Road Runner began advertising to its users advertisements in the way of web landing pages. When Road Runner detects an invalid domain (or DNS error) it will redirect the browser to a web site with a mixture of ads and search results served by Yahoo.
Some users are even complaining that Road Runner is redirecting valid domains to this landing page such as www.google.com!
Fortunately, Road Runner does provide a way to disable this default DNS service. On the bottom of the landing page is a link to service settings http://ww23.rr.com/prefs.php.
From here, simply disable the entire service. This may take a few minutes to take effect and it will affect every computer in your local network. The settings are tied to your Cable modems MAC address. You can revisit the settings page to modify the values should you ever want that.