Index: views.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/views/views.module,v
retrieving revision 1.166.2.45
diff -u -F^f -r1.166.2.45 views.module
--- views.module	12 Jan 2008 18:35:02 -0000	1.166.2.45
+++ views.module	10 May 2008 19:22:14 -0000
@@ -1329,6 +1329,10 @@ function views_filters($view) {
 }
 
 function _views_build_filters_form($view) {
+  // When the form is retrieved through an AJAX callback, the cache hasn't
+  // been loaded yet. The cache is necesssary for _views_get_filters().
+  views_load_cache();
+
   $filters = _views_get_filters();
   foreach ($view->exposed_filter as $count => $expose) {
     $id = $expose['id'];