Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.900
diff -u -p -r1.900 common.inc
--- includes/common.inc	14 May 2009 08:23:14 -0000	1.900
+++ includes/common.inc	15 May 2009 15:11:43 -0000
@@ -4248,7 +4248,8 @@ function drupal_flush_all_caches() {
 function _drupal_flush_css_js() {
   $string_history = variable_get('css_js_query_string', '00000000000000000000');
   $new_character = $string_history[0];
-  $characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+  // Not including 'q' to allow certain JavaScripts to re-use query string.
+  $characters = 'abcdefghijklmnoprstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
   while (strpos($string_history, $new_character) !== FALSE) {
     $new_character = $characters[mt_rand(0, strlen($characters) - 1)];
   }