gistfile1.php

public function create($data = array(), $filterKey = false) {

 $this->_validator = new ModelValidator($this);

 return parent::create($data);
}

// TEST that shows issue/fix

public function testModelValidationClearing() {

	$this->AppModelTestModel->validator()
		->add(
			'firstname',
			'required',
			array(
				'rule' => 'notEmpty',
				'required' => true
			)
		)->add(
			'lastname',
			'required',
			array(
				'rule' => 'notEmpty',
				'required' => false
			)
		);

	// save some invalid data to see it fail
	$result = $this->AppModelTestModel->save(array('firstname' => '', 'lastname' => ''));

	$this->assertFalse($result, "Invalid fields should both fail validation");

	// call create(). we're expecting this to clear all validation fails from before
	$this->AppModelTestModel->create(null);

	// attempt to re-save new data with a previously invalidated field, but not required, removed
	$result = $this->AppModelTestModel->save(array('firstname' => 'Hi'));

	$this->assertTrue($result, "Previously invalidated field, which we just removed, should no longer invalidate");

}