Index: includes/common.inc
===================================================================
--- includes/common.inc	(revision 353)
+++ includes/common.inc	(working copy)
@@ -1555,8 +1555,10 @@
 /**
  * Delete all cached CSS files.
  */
-function drupal_clear_css_cache() {
+function drupal_clear_css_cache() {  
   file_scan_directory(file_create_path('css'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
+  //We also need to clear the page cache, so that cached pages do not reference non-existant CSS
+  cache_clear_all();
 }
 
 /**