Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.667
diff -u -p -r1.667 common.inc
--- includes/common.inc	29 Jun 2007 18:06:50 -0000	1.667
+++ includes/common.inc	30 Jun 2007 19:34:03 -0000
@@ -1540,6 +1540,7 @@ function drupal_get_css($css = NULL) {
   if (!isset($css)) {
     $css = drupal_add_css();
   }
+  drupal_alter('css', $css);
   $no_module_preprocess = '';
   $no_theme_preprocess = '';