Images not linked

I just started getting the hang of the new image/thumbnail handling native since 2.9. For some reason none of the thumbnail images I am using on my site are hyperlinked when I add them using the “featured image” option, having added
if ( function_exists( ‘add_image_size’ ) )
add_theme_support( ‘post-thumbnails’ );

if ( function_exists( ‘add_image_size’ ) ) {
add_image_size( ‘category-thumb’, 50, 50 );
add_image_size( ‘index-thumb’, 130, 98, true );
}

to my theme where necessary (I’m using evidens white)

when i just embed them in the post they link fine from the home page, etc.
How can I get the images that I automatically add through featured images/thumbs in WP to be hyperlinked?

Also I’m using the “featured posts with thumbnails” plugin on the sidebar and those images aren’t linked either, though that probably has to do with the plugin. I would like those to be linked too.

my site is: http://cityrat.com