- Patch #531476 by JohnAlbin: corrected some favicon mime-type behavior.

modules/system/system.admin.inc

@@ -559,11 +559,7 @@ function system_theme_settings(&$form_state, $key = '') {
 function system_theme_settings_submit($form, &$form_state) {
   $values = $form_state['values'];
   if (empty($values['default_favicon']) && !empty($values['favicon_path'])) {
-    $mimetype = file_get_mimetype($values['favicon_path']);
-    // Use the default MIME type for favicons if no other was found.
-    if ($mimetype != 'application/octet-stream') {
-      $values['favicon_mimetype'] = $mimetype;
-    }
+    $values['favicon_mimetype'] = file_get_mimetype($values['favicon_path']);
   }
   $key = $values['var'];