Drupal 7, displaying an image to search results
This is a core issue. See http://drupal.org/node/1166114.

Workaround is to add this to your theme's template.php. Also copy search-result.tpl.php from the core search module into your theme folder and clear cache. 

function YOURTHEME_preprocess_search_result(&amp;$variables) {
  $result = $variables['result'];
  if (isset($result['node'])) {
    $variables['snippet'] = $result['node']-&gt;rendered;
  }
}


The rendered node will pick up the Manage Display settings.