Event Registration Profiles Fail to Load Address Data

Reproduced on demo site and on separate production site.

1. Create an event with a profile that contains email as well as (home) and (primary) address fields
2. Edit the 'demo' user and make sure it has a (home) address
3. Proceed to a registration page such as:
http://drupal.demo.civicrm.org/civicrm/event/register?id=3&reset=1
4. Observe that the address fields are blank

This is making registration forms a pain and creating data loss.