Maybe it's Drupal infrastructure problem, but I have the following errors when update.module tries to fetch update information for Views Field View module:

Notice: Undefined offset: 1 in drupal_http_request() (line 984 of includes/common.inc).
Notice: Undefined offset: 1 in _drupal_parse_response_status() (line 1112 of includes/common.inc).

The actual request URL is:
http://updates.drupal.org/release-history/views_field_view/7.x?site_key=...