rest API Call to fetch relationship types broken in 3.2

Regarding civicrm_relationship_types_get or civicrm_relationship_type_get

In version 3.1, I was able to fetch all relationship types after authenticating using a URL like this one:
http://www.server.org/administrator/components/com_civicrm/civicrm/extern/rest.php?q=civicrm/relationship/types_get&json=1&PHPSESSID=*redacted*&api_key=redacted*key=*redacted*&rowCount=1000

After upgrade to 3.2, this results in the following JSON error object:

{"error_message":"Unknown function called: civicrm_relationship_types_get","is_error":1}