This symbol means the link to the left of the arrow points to an external website -- you will need an internet connection. When you click on the link, the external website will load.

Because Internet Explorer doesn't adhere to web standards, this feature will not work if you're using Internet Explorer. It has been tested in Firefox, Safari, Opera, iCab, and Mozilla -- all on the Mac and PC. It's also tested on Shiira and Flock on the Mac. Yep, it's just Internet Explorer that fails.

Do yourself a favor and get Firefox!