Confluence changes in the last 24 hours email shows users as anonymous.

After the upgrade from 5.1-OD-13 to 5.2-OD-3 on July 8, 2013 the Daily update email shows all users as Anonymous.

The following text shows in the email:
Page: Example Page! created by Anonymous [12:05 AM]

A fix for this will be available 29th July 2013