akrabat

The DiggBar is a URL shortening service that puts your website within a frame on digg.com. As a result, the user sees Digg’s URL, rather than your URL in their address bar, no matter which page they navigate to on your site. You can see an example DiggBar URL that points to google.com: <a href="http://digg.com/http://google.com" rel="nofollow ugc">http://digg.com/http://google.com</a> which is automatically converted to <a href="http://digg.com/d1nYVs" rel="nofollow ugc">http://digg.com/d1nYVs</a>.
The No DiggBar WordPress plugin automatically redirects anyone using the DiggBar service, so that your site’s URL is displayed in the address bar of the browser.

No DiggBar

This plugin redirects DiggBar users to your actual site.

paulmac

Uses a short javascript to remove any containing frames around your WordPress site. The Digg toolbar now adds frames to sites, affecting site owners traffic stats and SEO. Using “WP Frame Breaker” will force your site out of the Digg containing frame.

WP Frame Breaker

Adds a short javascript to your blog header to break out of any containing frames

No DiggBar vs WP Frame Breaker