pgAdmin III does not display Default Privileges for schemas

Follow these steps to reproduce:

1. Connect to the postgres DB.
2. Run the following SQL:

create database test_database;

3. Run the following SQL:

create role my_group;

4. Connect to the test_database DB.
5. Run the following SQL:

alter default privileges in schema public grant all on types to my_group;

6. Open pgAdmin III.
7. Navigate to the public schema in test_database.
8. Right-click the public schema and choose Properties.
9. Select the Default Privileges tab.
10. Note that all four subtabs are empty, and the Role drop-down lists do
not list my_group as a role.