diff -urp ubercart-2.x-dev-20110829/uc_attribute/uc_attribute.admin.inc ubercart-2.x-dev-20110829--298395/uc_attribute/uc_attribute.admin.inc
--- ubercart-2.x-dev-20110829/uc_attribute/uc_attribute.admin.inc	2011-08-28 15:08:32.000000000 -0400
+++ ubercart-2.x-dev-20110829--298395/uc_attribute/uc_attribute.admin.inc	2011-09-17 04:12:41.000000000 -0400
@@ -186,6 +186,64 @@ function uc_attribute_delete_confirm_sub
   }
 }
 
+function uc_attribute_bulk_update_form($form_state, $object) {
+  drupal_set_title(check_plain($object->name));
+  $form = array();
+
+  $node_type = $object->pcid;
+
+  $form['node_type'] = array(
+    '#type' => 'hidden',
+    '#value' => $node_type,
+  );
+
+  // Select all products with current class.
+  $result = pager_query("SELECT n.nid, n.title, n.status, nt.name FROM {node} n LEFT JOIN {node_type} nt ON nt.type = n.type WHERE nt.type = '%s'", 50, 0, NULL, $node_type);
+  $nodes = array();
+  while ($node = db_fetch_object($result)) {
+    $nodes[$node->nid] = '';
+    $form['title'][$node->nid] = array('#value' => l($node->title, 'node/' . $node->nid));
+    $form['status'][$node->nid] =  array('#value' => ($node->status ? t('published') : t('not published')));
+    $form['type'][$node->nid] =  array('#value' => check_plain($node->name));
+  }
+
+  $form['nodes'] = array('#type' => 'checkboxes', '#options' => $nodes);
+
+  $form['flush'] = array(
+    '#type' => 'submit',
+    '#value' => t('Flush selected'),
+    '#submit' => array('uc_attribute_bulk_update_flush'),
+  );
+  $form['flush_all'] = array(
+    '#type' => 'submit',
+    '#value' => t('Flush all'),
+    '#submit' => array('uc_attribute_bulk_update_flush_all'),
+  );
+
+  $form['pager'] = array('#value' => theme('pager', NULL, 50, 0));
+  $form['#theme'] = 'uc_attribute_bulk_update';
+
+  return $form;
+}
+
+function uc_attribute_bulk_update_flush($form, &$form_state) {
+  $nodes = array_filter($form_state['values']['nodes']);
+  foreach ($nodes as $nid) {
+    $node = node_load($nid);
+    uc_attribute_reset($node);
+  }
+  drupal_set_message(t("Bulk update completed successfully on selected products."));
+}
+
+function uc_attribute_bulk_update_flush_all($form, &$form_state) {
+  $result = db_query("SELECT nid FROM {node} WHERE type = '%s'", $form_state['values']['node_type']);
+  while ($item = db_fetch_object($result)) {
+    $node = node_load($item->nid);
+    uc_attribute_reset($node);
+  }
+  drupal_set_message(t("Bulk update completed successfully on all products in this class."));
+}
+
 /**
  * Change the display of attribute option prices.
  *
@@ -410,7 +468,15 @@ function uc_attribute_option_form($form_
     '#default_value' => $option->weight,
     '#weight' => 3,
   );
-
+  if (isset($form['oid'])) {
+    $form['bulk_update'] = array(
+      '#type' => 'checkbox',
+      '#title' => t('Update existing products?'),
+      '#description' => t('If selected, existing products and product classes with this attribute will be updated with the values on this page.<br /><em><strong>Warning:</strong> any option adjustments set at the product level will be overridden!</em>'),
+      '#default_value' => 0,
+      '#weight' => 4,
+    );
+  }
   $form['submit'] = array(
     '#type' => 'submit',
     '#value' => t('Submit'),
@@ -455,8 +521,16 @@ function uc_attribute_option_form_submit
   else {
     db_query("UPDATE {uc_attribute_options} SET name = '%s', cost = %f, price = %f, weight = %f, ordering = %d WHERE aid = %d AND oid = %d",
       $form_state['values']['name'], $form_state['values']['cost'], $form_state['values']['price'], $form_state['values']['weight'], $form_state['values']['ordering'], $form_state['values']['aid'], $form_state['values']['oid']);
-    drupal_set_message(t('Updated option %option.', array('%option' => $form_state['values']['name'])));
-    watchdog('uc_attribute', 'Updated option %option.', array('%option' => $form_state['values']['name']), WATCHDOG_NOTICE, 'admin/store/attributes/'. $form_state['values']['aid'] .'/options/'. $form_state['values']['oid']);
+    $message = t('Updated option %option.', array('%option' => $form_state['values']['name']));
+    if ($form_state['values']['bulk_update'] == 1) {
+      db_query("UPDATE {uc_product_options} SET cost = '%f', price = '%f', weight = '%f', ordering = '%d' WHERE oid = '%d'",
+        $form_state['values']['cost'], $form_state['values']['price'], $form_state['values']['weight'], $form_state['values']['ordering'], $form_state['values']['oid']);
+      db_query("UPDATE {uc_class_attribute_options} SET cost = '%f', price = '%f', weight = '%f', ordering = '%d' WHERE oid = '%d'",
+        $form_state['values']['cost'], $form_state['values']['price'], $form_state['values']['weight'], $form_state['values']['ordering'], $form_state['values']['oid']);
+      $message .= t(' Bulk updates applied to all products and classes which have this attribute.');
+    }
+    drupal_set_message($message);
+    watchdog('uc_attribute', $message, array('%option' => $form_state['values']['name']), WATCHDOG_NOTICE, 'admin/store/attributes/'. $form_state['values']['aid'] .'/options/'. $form_state['values']['oid']);
     $form_state['redirect'] = 'admin/store/attributes/'. $form_state['values']['aid'] .'/options';
   }
 }
@@ -593,6 +667,14 @@ function uc_object_attributes_form($form
         '#value' => t('Save changes'),
         '#weight' => -2,
       );
+      if ($type == 'product') {
+        $form['reset'] = array(
+          '#type' => 'submit',
+          '#value' => t('Reset to defaults'),
+          '#submit' => array('uc_attribute_product_attributes_reset'),
+          '#weight' => -1,
+        );
+      }
     }
   }
   elseif ($view == 'add') {
@@ -769,6 +851,18 @@ function uc_object_attributes_form_submi
 }
 
 /**
+ * Reset product attributes to defaults for product class.
+ *
+ * @see uc_object_attributes_form()
+ */
+function uc_attribute_product_attributes_reset($form, &$form_state) {
+  $nid = $form_state['values']['id'];
+  $node = node_load($nid);
+  uc_attribute_reset($node);
+  drupal_set_message(t('Product attributes and options reset to class defaults.'));
+}
+
+/**
  * Form to assign and modify attribute options on products or classes.
  *
  * @ingroup forms
@@ -1219,3 +1313,39 @@ function uc_product_adjustments_form_sub
   }
   $form_state['redirect'] = $goto;
 }
+
+function theme_uc_attribute_bulk_update($form) {
+  $output = '';
+
+  $has_products = isset($form['title']) && is_array($form['title']);
+
+  $header[] = theme('table_select_header_cell');
+  $header[] = t('Title');
+  $header[] = t('Status');
+  $header[] = t('Type');
+
+  if ($has_products) {
+    foreach (element_children($form['title']) as $key) {
+      $row = array();
+      $row[] = drupal_render($form['nodes'][$key]);
+      $row[] = drupal_render($form['title'][$key]);
+      $row[] = drupal_render($form['status'][$key]);
+      $row[] = drupal_render($form['type'][$key]);
+      $rows[] = $row;
+    }
+  }
+  else {
+    $rows[] = array(array('data' => t('No products available.'), 'colspan' => '6'));
+  }
+
+  $output .= theme('table', $header, $rows);
+  if ($form['pager']['#value']) {
+    $output .= drupal_render($form['pager']);
+  }
+
+  $output .= drupal_render($form);
+
+  $output .= '<p>' . t('Flush actions take place immediately and cannot be undone.') . '</p>';
+
+  return $output;
+}
diff -urp ubercart-2.x-dev-20110829/uc_attribute/uc_attribute.module ubercart-2.x-dev-20110829--298395/uc_attribute/uc_attribute.module
--- ubercart-2.x-dev-20110829/uc_attribute/uc_attribute.module	2011-08-28 15:08:32.000000000 -0400
+++ ubercart-2.x-dev-20110829--298395/uc_attribute/uc_attribute.module	2011-09-20 13:17:02.000000000 -0400
@@ -42,6 +42,10 @@ function uc_attribute_help($path, $arg) 
     // Help message for the product Adjustments tab.
     case 'node/%/edit/adjustments':
       return t('Enter an alternate SKU to be used when the specified set of options are chosen and the product is added to the cart. <b>Warning:</b> Adding or removing attributes from this product will reset all the SKUs on this page to the default product SKU.');
+
+    // Help message for bulk updates tab.
+    case 'admin/store/products/classes/%/attributes_bulk':
+      return t('Bulk updates performed here will reset all attributes and options on the selected products to the current defaults for this product class.<p><em><strong>Warning:</strong> any product level customizations will be lost!</em></p>To perform bulk updates on specific option values without resetting attributes to the class defaults, go to <a href="!url">Store administration->Attributes</a> and edit the option, selecting the checkbox to update existing products.', array('!url' => url('admin/store/attributes')));
   }
 }
 
@@ -155,6 +159,15 @@ function uc_attribute_menu() {
     'weight' => 2,
     'file' => 'uc_attribute.admin.inc',
   );
+  $items['admin/store/products/classes/%uc_product_class/attributes_bulk'] = array(
+    'title' => 'Bulk',
+    'page callback' => 'drupal_get_form',
+    'page arguments' => array('uc_attribute_bulk_update_form', 4, 'class'),
+    'access callback' => 'uc_attribute_product_class_access',
+    'type' => MENU_LOCAL_TASK,
+    'weight' => 3,
+    'file' => 'uc_attribute.admin.inc',
+  );
 
   // Insert subitems into the edit node page for product types.
   $items['node/%node/edit/attributes'] = array(
@@ -268,6 +281,10 @@ function uc_attribute_theme() {
       'arguments' => array('product' => NULL),
       'file' => 'uc_attribute.admin.inc',
     ),
+    'uc_attribute_bulk_update' => array(
+      'arguments' => array('form' => NULL),
+      'file' => 'uc_attribute.admin.inc',
+    ),
   );
 }
 
@@ -346,23 +363,10 @@ function uc_attribute_nodeapi(&$node, $o
         }
         break;
       case 'insert':
-        switch ($GLOBALS['db_type']) {
-          case 'mysqli':
-          case 'mysql':
-            db_query("INSERT IGNORE INTO {uc_product_attributes} (nid, aid, label, ordering, required, display, default_option) SELECT %d, aid, label, ordering, required, display, default_option FROM {uc_class_attributes} WHERE pcid = '%s'", $node->nid, $node->type);
-            db_query("INSERT IGNORE INTO {uc_product_options} (nid, oid, cost, price, weight, ordering) SELECT %d, oid, cost, price, weight, ordering FROM {uc_class_attribute_options} WHERE pcid = '%s'", $node->nid, $node->type);
-            break;
-          case 'pgsql':
-            db_query("INSERT INTO {uc_product_attributes} (nid, aid, label, ordering, required, display, default_option) SELECT %d, aid, label, ordering, required, display, default_option FROM {uc_class_attributes} WHERE pcid = '%s'", $node->nid, $node->type);
-            db_query("INSERT INTO {uc_product_options} (nid, oid, cost, price, weight, ordering) SELECT %d, oid, cost, price, weight, ordering FROM {uc_class_attribute_options} WHERE pcid = '%s'", $node->nid, $node->type);
-            break;
-        }
-
+        uc_attribute_insert($node);
         break;
       case 'delete':
-        db_query("DELETE FROM {uc_product_options} WHERE nid = %d", $node->nid);
-        db_query("DELETE FROM {uc_product_adjustments} WHERE nid = %d", $node->nid);
-        db_query("DELETE FROM {uc_product_attributes} WHERE nid = %d", $node->nid);
+        uc_attribute_remove($node);
         break;
       case 'update index':
         $output = '';
@@ -383,6 +387,40 @@ function uc_attribute_nodeapi(&$node, $o
   }
 }
 
+/**
+ * Add default attributes to a product node.
+ */
+function uc_attribute_insert($node) {
+  switch ($GLOBALS['db_type']) {
+    case 'mysqli':
+    case 'mysql':
+      db_query("INSERT IGNORE INTO {uc_product_attributes} (nid, aid, label, ordering, required, display, default_option) SELECT %d, aid, label, ordering, required, display, default_option FROM {uc_class_attributes} WHERE pcid = '%s'", $node->nid, $node->type);
+      db_query("INSERT IGNORE INTO {uc_product_options} (nid, oid, cost, price, weight, ordering) SELECT %d, oid, cost, price, weight, ordering FROM {uc_class_attribute_options} WHERE pcid = '%s'", $node->nid, $node->type);
+      break;
+    case 'pgsql':
+      db_query("INSERT INTO {uc_product_attributes} (nid, aid, label, ordering, required, display, default_option) SELECT %d, aid, label, ordering, required, display, default_option FROM {uc_class_attributes} WHERE pcid = '%s'", $node->nid, $node->type);
+      db_query("INSERT INTO {uc_product_options} (nid, oid, cost, price, weight, ordering) SELECT %d, oid, cost, price, weight, ordering FROM {uc_class_attribute_options} WHERE pcid = '%s'", $node->nid, $node->type);
+      break;
+  }
+}
+
+/**
+ * Remove all attributes from a product node.
+ */
+function uc_attribute_remove($node) {
+  db_query("DELETE FROM {uc_product_options} WHERE nid = %d", $node->nid);
+  db_query("DELETE FROM {uc_product_adjustments} WHERE nid = %d", $node->nid);
+  db_query("DELETE FROM {uc_product_attributes} WHERE nid = %d", $node->nid);
+}
+
+/**
+ * Reset attributes to class defaults for a product node.
+ */
+function uc_attribute_reset($node) {
+  uc_attribute_remove($node);
+  uc_attribute_insert($node);
+}
+
 /******************************************************************************
  * Ubercart Hooks                                                             *
  ******************************************************************************/