Index: includes/form.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/form.inc,v
retrieving revision 1.426
diff -u -r1.426 form.inc
--- includes/form.inc	8 Jan 2010 06:36:34 -0000	1.426
+++ includes/form.inc	8 Jan 2010 10:14:30 -0000
@@ -3375,8 +3375,8 @@
 /**
  * Processes the batch.
  *
- * Unless the batch has been marked with 'progressive' = FALSE, the function
- * issues a drupal_goto and thus ends page execution.
+ * By default, the function issues a drupal_goto and thus ends page execution.
+ * See the $progressive and $redirect_callback parameters.
  *
  * This function is generally not needed in form submit handlers;
  * Form API takes care of batches that were set during form submission.
@@ -3391,8 +3391,10 @@
  *   processing page. By default drupal_goto() will be used to redirect to a
  *   page which will do the progressive page. Specifying another function will
  *   allow the progressive processing to be processed differently.
+ * @param $progressive
+ *   (optional) Boolean indicating whether the processing should . Defaults to TRUE.
  */
-function batch_process($redirect = NULL, $url = 'batch', $redirect_callback = 'drupal_goto') {
+function batch_process($redirect = NULL, $url = 'batch', $redirect_callback = 'drupal_goto', $progressive = TRUE) {
   $batch =& batch_get();
 
   drupal_theme_initialize();
@@ -3401,7 +3403,7 @@
     // Add process information
     $process_info = array(
       'current_set' => 0,
-      'progressive' => TRUE,
+      'progressive' => $progressive,
       'url' => $url,
       'url_options' => array(),
       'source_url' => $_GET['q'],
Index: install.php
===================================================================
RCS file: /cvs/drupal/drupal/install.php,v
retrieving revision 1.231
diff -u -r1.231 install.php
--- install.php	4 Jan 2010 23:08:34 -0000	1.231
+++ install.php	8 Jan 2010 10:11:43 -0000
@@ -436,13 +436,9 @@
       if ($install_state['interactive']) {
         variable_set('install_current_batch', $function);
       }
-      else {
-        $batch =& batch_get();
-        $batch['progressive'] = FALSE;
-      }
       // Process the batch. For progressive batches, this will redirect.
       // Otherwise, the batch will complete.
-      batch_process(install_redirect_url($install_state), install_full_redirect_url($install_state));
+      batch_process(install_redirect_url($install_state), install_full_redirect_url($install_state), 'drupal_goto', $install_state['interactive']);
     }
     // If we are in the middle of processing this batch, keep sending back
     // any output from the batch process, until the task is complete.