financial_type_id not returned on Contribution get

If I create some contributions, then use the API explorer or my own hooks to try to get the financial_type_id, it isn't returned. For example, after creating one "Donation" and one "Member Dues" contribution in the sandbox, I used the api explorer to set up:

$result = civicrm_api3('Contribution', 'get', array(
'sequential' => 1,
'return' => "financial_type_id,total_amount",
));

But the results don't include that field:

{
"is_error":0,
"version":3,
"count":2,
"values":[

{ "contact_id":"3", "contribution_id":"1", "total_amount":"10.00", "id":"1" }

,

{ "contact_id":"3", "contribution_id":"2", "total_amount":"10.00", "id":"2" }

]

Erik Hommel added, on the forum:

"I do get the financial type if I do a get without a return. So a:

$result = civicrm_api3('Contribution', 'Get', array());

does show the financial_type_id in my install.

But adding the return shows the same problem for me."