Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.474
diff -u -p -r1.474 system.module
--- modules/system/system.module	6 May 2007 05:47:52 -0000	1.474
+++ modules/system/system.module	8 May 2007 09:26:40 -0000
@@ -2204,14 +2204,18 @@ function system_theme_settings($key = ''
     if (function_exists($function)) {
       if ($themes[$key]->template) {
         // file is a template or a style of a template
-        $form['specific'] = array('#type' => 'fieldset', '#title' => t('Engine-specific settings'), '#description' => t('These settings only exist for all the templates and styles based on the %engine theme engine.', array('%engine' => $themes[$key]->prefix)));
+        $group = $function();
+        if (!empty($group)) {
+          $form['engine_specific'] = array('#type' => 'fieldset', '#title' => t('Engine-specific settings'), '#description' => t('These settings only exist for all the templates and styles based on the %engine theme engine.', array('%engine' => $themes[$key]->prefix)));
+          $form['engine_specific'] = array_merge($form['engine_specific'], $group);
+        }
       }
-      else {
-        // file is a theme or a style of a theme
-        $form['specific'] = array('#type' => 'fieldset', '#title' => t('Theme-specific settings'), '#description' => t('These settings only exist for the %theme theme and all the styles based on it.', array('%theme' => $themes[$key]->prefix)));
+      // file is a theme or a style of a theme
+      $group = $function($key);
+      if (!empty($group)) {
+        $form['theme_specific'] = array('#type' => 'fieldset', '#title' => t('Theme-specific settings'), '#description' => t('These settings only exist for the %theme theme and all the styles based on it.', array('%theme' => ($themes[$key]->template) ? $key : $themes[$key]->prefix)));
+        $form['theme_specific'] = array_merge($form['theme_specific'], $group);
       }
-      $group = $function();
-      $form['specific'] = array_merge($form['specific'], (is_array($group) ? $group : array()));
     }
   }
   $form['#attributes'] = array('enctype' => 'multipart/form-data');
Index: themes/engines/phptemplate/phptemplate.engine
===================================================================
RCS file: /cvs/drupal/drupal/themes/engines/phptemplate/phptemplate.engine,v
retrieving revision 1.65
diff -u -p -r1.65 phptemplate.engine
--- themes/engines/phptemplate/phptemplate.engine	6 May 2007 05:47:52 -0000	1.65
+++ themes/engines/phptemplate/phptemplate.engine	8 May 2007 09:26:40 -0000
@@ -75,3 +75,27 @@ function phptemplate_engine_preprocess(&
   $variables['directory'] = path_to_theme();
   $variables['is_front'] = drupal_is_front_page();
 }
+
+/**
+ * Adds additional form elements to a theme settings page.
+ *
+ * @param $key
+ *   The name of the theme.
+ */
+function phptemplate_settings($key = NULL) {
+  $form = array();
+  if (!empty($key)) {
+    $themes = list_themes();
+    if (isset($themes[$key])) {
+      // Determine if the $key theme is a sub-theme of a phptemplate theme.
+      $dir = strstr($themes[$key]->filename, 'page.tpl.php') ? $themes[$key]->filename : $themes[$key]->description;
+      $dir = str_replace('/page.tpl.php', '', $dir);
+      if (file_exists("./$dir/settings.php")) {
+        // Allow settings.php file to add items to the $form variable.
+        include "./$dir/settings.php";
+      }
+    }
+  }
+  return $form;
+}
+