Index: modules/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system.module,v
retrieving revision 1.260
diff -u -r1.260 system.module
--- modules/system.module	29 Nov 2005 02:52:20 -0000	1.260
+++ modules/system.module	29 Nov 2005 16:00:40 -0000
@@ -160,30 +160,33 @@
 function system_user($type, $edit, &$user, $category = NULL) {
   if ($type == 'form' && $category == 'account') {
     $themes = list_themes();
-    ksort($themes);
-
-    // Reset to follow site default theme if user selects the site default
-    if ($key == variable_get('theme_default', 'bluemarine')) {
-      $key = '';
-      if ($edit['theme'] == variable_get('theme_default', 'bluemarine')) {
-        $edit['theme'] = '';
+      
+    if (count($themes) > 1) {
+      ksort($themes);
+
+      // Reset to follow site default theme if user selects the site default
+      if ($key == variable_get('theme_default', 'bluemarine')) {
+        $key = '';
+        if ($edit['theme'] == variable_get('theme_default', 'bluemarine')) {
+          $edit['theme'] = '';
+        }
       }
-    }
 
-    $form['themes'] = array(
-      '#type' => 'fieldset', '#title' => t('Theme configuration'), '#description' => t('Selecting a different theme will change the look and feel of the site.'), '#weight' => 2, '#collapsible' => TRUE, '#theme' => 'system_user');
+      $form['themes'] = array(
+        '#type' => 'fieldset', '#title' => t('Theme configuration'), '#description' => t('Selecting a different theme will change the look and feel of the site.'), '#weight' => 2, '#collapsible' => TRUE, '#theme' => 'system_user');
 
-    foreach ($themes as $info) {
-      $info->screenshot = dirname($info->filename) . '/screenshot.png';
-      $screenshot = file_exists($info->screenshot) ? theme('image', $info->screenshot, t('Screenshot for %theme theme', array('%theme' => $info->name)), '', array('class' => 'screenshot'), false) : t('no screenshot');
+      foreach ($themes as $info) {
+        $info->screenshot = dirname($info->filename) . '/screenshot.png';
+        $screenshot = file_exists($info->screenshot) ? theme('image', $info->screenshot, t('Screenshot for %theme theme', array('%theme' => $info->name)), '', array('class' => 'screenshot'), false) : t('no screenshot');
+
+        $form['themes'][$info->name]['screenshot'] = array('#type' => 'markup', '#value' => $screenshot);
+        $form['themes'][$info->name]['description'] = array('#type' => 'item', '#title' => $info->name,  '#value' => dirname($info->filename));
+        $options[$info->name] = '';
+      }
 
-      $form['themes'][$info->name]['screenshot'] = array('#type' => 'markup', '#value' => $screenshot);
-      $form['themes'][$info->name]['description'] = array('#type' => 'item', '#title' => $info->name,  '#value' => dirname($info->filename));
-      $options[$info->name] = '';
+      $form['themes']['theme'] = array('#type' => 'radios', '#options' => $options, '#default_value' => $edit['theme'] ? $edit['theme'] : variable_get('theme_default', 'bluemarine'));
     }
 
-    $form['themes']['theme'] = array('#type' => 'radios', '#options' => $options, '#default_value' => $edit['theme'] ? $edit['theme'] : variable_get('theme_default', 'bluemarine'));
-
     if (variable_get('configurable_timezones', 1)) {
       $zones = _system_zonelist();
       $form['locale'] = array('#type'=>'item', '#title' => t('Locale settings'), '#weight' => 6);