Index: vertical_tabs.module
===================================================================
--- vertical_tabs.module	(revision 1068)
+++ vertical_tabs.module	(working copy)
@@ -148,7 +148,7 @@
 }
 
 function vertical_tabs_save_config($form_id, $fieldsets) {
-  $config = variable_get('vertical_tabs_form', array());
+  $config = variable_get('vertical_tabs_forms', array());
   $config[$form_id] = $fieldsets;
   variable_set('vertical_tabs_forms', $config);
 }