We recevently update to 4.7.2 and this seems to have broken something in the API regarding the BETWEEN operator.
This used to work:
$result = civicrm_api3('Contribution', 'get', array( 'sequential' => 1, 'receive_date' => array('BETWEEN' => array("2015-10-01", "2015-12-31")), ));
Now it returns no results. However less than and likewise operators return correct results.
Is it a bug or am I using it wrong?