Index: xspf_playlist_thumb/xspf_playlist_thumb.module
===================================================================
--- xspf_playlist_thumb/xspf_playlist_thumb.module	(revision 902)
+++ xspf_playlist_thumb/xspf_playlist_thumb.module	(working copy)
@@ -50,7 +50,6 @@
   }
 }
 
-
 /* ******************************************************* */
 /* XSPF PLAYLIST HOOKS                                     */
 /* ******************************************************* */
@@ -68,20 +67,24 @@
  */
 function xspf_playlist_thumb_xspf_playlist_item_alter(&$item, $node, $url) {
   // Look for modules that return potential thumbs.
+  // take module weights into consideration.
   $modules = variable_get('xspf_'. $node->type .'_thumb', false);
   if ($modules) {
     foreach ($modules as $module) {
-      // split the name into parts
       list($module_name, $separator, $config) = split('[--]', $module);
+      $possible_modules[$module_name] = $config;
+    }
+    $all_modules = module_list();
+    $modules = array_intersect_key($all_modules, $possible_modules);
+
+    foreach ($modules as $module) {
       // invoke the thumbnail hook
-      if (module_exists($module_name)) {
-        if ($thumb = module_invoke($module_name, 'xspf_playlist_thumbnail', 'return', $node, $config)) {
-          // Some modules may pass back an array. Only take the first item
-          if (is_array($thumb)) {$thumb = $thumb[0]; }
-          // We're only returning the specified thumb.
-          xspf_playlist_item_set_value($item, array('key' => 'image', 'value' => $thumb), false, false);
-          return;
-        }
+      if ($thumb = module_invoke($module, 'xspf_playlist_thumbnail', 'return', $node, $possible_modules[$module])) {
+        // Some modules may pass back an array. Only take the first item
+        if (is_array($thumb)) {$thumb = $thumb[0]; }
+        // We're only returning the specified thumb.
+        xspf_playlist_item_set_value($item, array('key' => 'image', 'value' => $thumb), false, false);
+        return;
       }
     }
   }
@@ -191,10 +194,12 @@
 function xspf_playlist_thumb_get_cck_imagefield_files($node,$field_name) {
   if (isset($node->{$field_name})) {
     $thumbs = array();
-    foreach($node->{$field_name} as $field) {
-      $thumbs[] = $GLOBALS['base_path'] . $field['filepath'];
+    foreach ($node->{$field_name} as $field) {
+      if ($field['filepath']) {
+        $thumbs[] = $GLOBALS['base_path'] . $field['filepath'];
+      }
     }
-  return $thumbs?$thumbs:'';
+    return $thumbs? $thumbs: '';
   }
 }