DISPLAY POST THUMBNAILS IN THE FEED

function diw_post_thumbnail_feeds($content) {
    global $post;
    if(has_post_thumbnail($post->ID)) {
        $content = '<noindex><div style="float: left; margin: 0px 15px 0px 0px; margin-top: 3px;"><a rel="nofollow" href="'.get_permalink($post->ID).'" >' . get_the_post_thumbnail($post->ID,$size='thumbnail') . '</a></div></noindex>' . $content . '<br/><br/>';
    }
    return $content;
}
add_filter('the_excerpt_rss', 'diw_post_thumbnail_feeds');
add_filter('the_content_feed', 'diw_post_thumbnail_feeds');