earthly touch doesn't show the links in the main page

My website http://iescavaleri.com runs the last version of WordPress (3.6) with the Earthly Touch theme. Everything seems to work well, is it wasn’t for the fact that the links within the posts are not shown as links at all, I mean, theya appear as regular text, and if you click on them nothing happens because they are not actual links. However, if you click on the post’s title you are diected to the post page and, in this page the links are perfectly shown and they work well.

Any idea what I can do to solve the problem? Thanks in advance.