Index: modules/system/system.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.install,v
retrieving revision 1.236
diff -u -p -r1.236 system.install
--- modules/system/system.install	28 Jan 2008 19:56:27 -0000	1.236
+++ modules/system/system.install	29 Jan 2008 10:49:13 -0000
@@ -2484,9 +2484,8 @@ function system_update_6046() {
  */
 function system_update_6047() {
   $ret = array();
-  $ret[] = update_sql("UPDATE {blocks} SET cache = %d WHERE module = '%s' AND delta = '%s'", -1, 'user', '0');
-  $ret[] = update_sql("UPDATE {blocks} SET cache = %d WHERE module = '%s' AND delta = '%s'", -1, 'user', '1');
-  $ret[] = update_sql("UPDATE {blocks} SET cache = %d WHERE module = '%s' AND delta = '%s'", -1, 'system', '0');
+  $ret[] = update_sql("UPDATE {blocks} SET cache = -1 WHERE module = 'user' AND delta IN ('0', '1')");
+  $ret[] = update_sql("UPDATE {blocks} SET cache = -1 WHERE module = 'system' AND delta = '0'");
   return $ret;
 }