Index: spaces_og.module
===================================================================
--- spaces_og.module
+++ spaces_og.module
@@ -703,9 +703,9 @@
 
   // Retrieve the content type label
   $types = node_get_types();
-  if (!empty($types['group'])) {
-    $typename = $types['group']->name;
-  }
+  $group_types = og_get_types('group');
+  // If there's only one group node type, use it's name, otherwise use the generic 'Group'.
+  $typename = (count($group_types) === 1) ? $types[$group_types[0]]->name : t('Group');
 
   // Collect groups for which this feature is enabled
   $options = array(0 => '--'. t('Select a !typename', array('!typename' => $typename)) .'--');