? null_schema_cast.patch
? sites/default/files
? sites/default/settings.php
Index: includes/bootstrap.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/bootstrap.inc,v
retrieving revision 1.269
diff -u -p -r1.269 bootstrap.inc
--- includes/bootstrap.inc	31 Jan 2009 16:50:56 -0000	1.269
+++ includes/bootstrap.inc	6 Feb 2009 14:59:29 -0000
@@ -1417,7 +1417,8 @@ function drupal_get_schema($table = NULL
       require_once DRUPAL_ROOT . '/includes/common.inc';
       // Invoke hook_schema for all modules.
       foreach (module_implements('schema') as $module) {
-        $current = module_invoke($module, 'schema');
+        // Cast to an array to prevent schema errors.
+        $current = (array) module_invoke($module, 'schema');
         if (drupal_function_exists('_drupal_initialize_schema')) {
           _drupal_initialize_schema($module, $current);
         }