Index: modules/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system.module,v
retrieving revision 1.239
diff -u -r1.239 system.module
--- modules/system.module	9 Oct 2005 10:39:15 -0000	1.239
+++ modules/system.module	14 Oct 2005 20:54:24 -0000
@@ -773,6 +773,11 @@
     if (is_array($values['status'])) {
       foreach ($values['status'] as $key => $choice) {
         if ($choice) {
+          // If theme status is being set to 1 from 0, initialize block data for this theme if necessary.
+          if (db_num_rows(db_query("SELECT status FROM {system} WHERE type = 'theme' AND name = '%s' AND status = 0", $key))) {
+            system_initialize_theme_blocks($key);
+          }
+
           db_query("UPDATE {system} SET status = 1 WHERE type = 'theme' and name = '%s'", $key);
         }
       }