My featured images don’t work..

I have a buddypress installation on a wordpress network. My themes is Network and it’s working very vell. But on my front page, my featured images don’t show up. It works perfectly on every sub pages/blogs with the network theme, but not on the main front page with buddypress installed. When some post from the other blogs on my site, are listen in the frontpage, the featured images are working fine for they, but not post from and on the main page. Any idea?

Link to my site is: http://xprox.net/

Strange link that appears for the featured images: http://xprox.net/wp-content/themes/network/library/functions/timthumb.php?src=/wp-contenthttp://xprox.net/wp-content/uploads/2011/05/Uncharted-3_2.jpg&h=108&w=227&zc=1&multisite=false&blogdirid=1

Sample post where the featured images are not working, are named TestPost