Index: bio.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/bio/bio.module,v
retrieving revision 1.2.2.12
diff -u -p -r1.2.2.12 bio.module
--- bio.module	3 Jul 2007 18:28:09 -0000	1.2.2.12
+++ bio.module	7 Nov 2007 18:58:28 -0000
@@ -234,7 +234,9 @@ function bio_settings() {
  * validate phase because submits were interfering with the #base attribute. Yuck.
  */
 function bio_settings_validate_xxx($form_id, $form_values) {
-  views_invalidate_cache();
+  if (module_exists('views')) {
+    views_invalidate_cache();
+  }
 }
 
 /**