Module fails to load RSS Feed with errors

Used the Alpha module to try a load a pictures feed from Google and get errors.

The Feed is

http://picasaweb.google.co.uk/data/feed/base/user/tim.bentley/albumid/52...

The errors are:

* Notice: Trying to get property of non-object in aggregator_page_source() (line 39 of /home/timali/public_html/drupal7/modules/aggregator/aggregator.pages.inc).
* Notice: Trying to get property of non-object in template_preprocess_aggregator_feed_source() (line 491 of /home/timali/public_html/drupal7/modules/aggregator/aggregator.pages.inc).
* Notice: Trying to get property of non-object in template_preprocess_aggregator_feed_source() (line 491 of /home/timali/public_html/drupal7/modules/aggregator/aggregator.pages.inc).
* Notice: Trying to get property of non-object in template_preprocess_aggregator_feed_source() (line 492 of /home/timali/public_html/drupal7/modules/aggregator/aggregator.pages.inc).
* Notice: Trying to get property of non-object in template_preprocess_aggregator_feed_source() (line 493 of /home/timali/public_html/drupal7/modules/aggregator/aggregator.pages.inc).
* Notice: Trying to get property of non-object in template_preprocess_aggregator_feed_source() (line 494 of /home/timali/public_html/drupal7/modules/aggregator/aggregator.pages.inc).
* Notice: Trying to get property of non-object in template_preprocess_aggregator_feed_source() (line 496 of /home/timali/public_html/drupal7/modules/aggregator/aggregator.pages.inc).
* Notice: Trying to get property of non-object in aggregator_feed_items_load() (line 93 of /home/timali/public_html/drupal7/modules/aggregator/aggregator.pages.inc).