Hosting Queues Summary Block is stale

If the 'hosting queues summary" is enabled and placed in a page region, then it becomes stale and shows out of date information.

The problem is that the block is cached and not rebuilt until the expiry of the cached version (see http://www.agileapproach.com/blog-entry/caching-drupal for explanation of this time).

The block definition in hook_block in the hosting module should specify that the block is NOT to be cached, as per:

  $blocks['hosting_queues_summary'] = array('info' => t('Hosting queues summary'),
    'enabled' => 1, 'region' => 'right', 'weight' => 1, 'cache' => BLOCK_NO_CACHE);