diff -u image.admin.inc image.admin.inc
--- image.admin.inc	2011-07-06 14:17:11.208252000 -0500
+++ image.admin.inc	2011-07-06 14:23:30.446111000 -0500
@@ -284,6 +284,38 @@
 }
 
 /**
+ * Form builder; Form for flushing cache of an image style.
+ *
+ * @param $style
+ *   An image style array.
+ *
+ * @ingroup forms
+ * @see image_style_flush_form_submit()
+ */
+function image_style_flush_form($form, $form_state, $style) {
+  $form_state['image_style'] = $style;
+
+  return confirm_form(
+    $form,
+    t('Are you sure you want to flush the cache of image style: %style?', array('%style' => $style['name'])),
+    'admin/config/media/image-styles',
+    t('Any images that have been generated for this style will be deleted, and recreated the next time they are requested.'),
+    t('Flush Cache'),  t('Cancel')
+  );
+}
+
+/**
+ * Submit handler to flush cache of an image style.
+ */
+function image_style_flush_form_submit($form, &$form_state) {
+  $style = $form_state['image_style'];
+
+  image_style_flush($style);
+  drupal_set_message(t('Caches for image style %name have been flushed.', array('%name' => $style['name'])));
+  $form_state['redirect'] = 'admin/config/media/image-styles';
+}
+
+/**
  * Form builder; Form for deleting an image style.
  *
  * @param $style
diff -u image.module image.module
--- image.module	2011-07-06 14:17:11.267195000 -0500
+++ image.module	2011-07-06 14:18:26.397719000 -0500
@@ -126,6 +126,14 @@
     'access arguments' => array('administer image styles'),
     'file' => 'image.admin.inc',
   );
+  $items['admin/config/media/image-styles/flush/%image_style'] = array(
+    'title' => 'Flush style',
+    'description' => 'Flush cache for an image style.',
+    'page callback' => 'drupal_get_form',
+    'page arguments' => array('image_style_flush_form', 5),
+    'access arguments' => array('administer image styles'),
+    'file' => 'image.admin.inc',
+  );
   $items['admin/config/media/image-styles/delete/%image_style'] = array(
     'title' => 'Delete style',
     'description' => 'Delete an image style.',
Common subdirectories: tests and tests