Image help!

Hi,

Just today, I tried adding a featured image to a post like I always do. Usually it just opens a tab on the same page that lets me add a featured image. It looks like this: http://media.smashingmagazine.com/wp-content/uploads/2012/02/WPresponsiveimages-image3.png

but now for some reason it loads a different page with all my media in it. This is really irritating as I have to leave my post.

Any ideas why this is happening?

Thanks in advance!

The blog I need help with is lucasgabellinifava.wordpress.com.

PS this is now happening with all images! Even when I try to add imaged to a post or when I try to add a gallery to a post!

Its SUPER important! Please help!