=== includes/theme.inc
==================================================================
--- includes/theme.inc  (revision 72)
+++ includes/theme.inc  (local)
@@ -787,6 +787,10 @@
   return '<style type="text/css" media="'. $media .'">@import "'. $stylesheet .'";</style>';
 }
 
+function theme_drupal_stylesheet_import() {
+  return theme('stylesheet_import', 'misc/drupal.css');
+}
+
 /**
  * Return a themed list of items.
  *
=== includes/common.inc
==================================================================
--- includes/common.inc  (revision 72)
+++ includes/common.inc  (local)
@@ -74,7 +74,7 @@
 
   $output = "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n";
   $output .= "<base href=\"$base_url/\" />\n";
-  $output .= theme('stylesheet_import', 'misc/drupal.css');
+  $output .= theme('drupal_stylesheet_import');
 
   return $output . drupal_set_html_head();
 }