Returning response objects from controllers wasn't working correctly.

lib/Cake/Routing/Dispatcher.php

@@ -110,12 +110,14 @@ class Dispatcher {
 		$controller->constructClasses();
 		$controller->startupProcess();
 
+		$render = true;
 		$result = $controller->invokeAction($request);
 		if ($result instanceof CakeResponse) {
+			$render = false;
 			$response = $result;
 		}
 		
-		if ($controller->autoRender) {
+		if ($render && $controller->autoRender) {
 			$response = $controller->render();
 		} elseif ($response->body() === null) {
 			$response->body($result);

lib/Cake/Test/Case/Routing/DispatcherTest.php

@@ -167,6 +167,15 @@ class SomePagesController extends AppController {
 		return true;
 	}
 
+/**
+ * Test method for returning responses.
+ *
+ * @return CakeResponse
+ */
+	public function responseGenerator() {
+		return new CakeResponse(array('body' => 'new response'));
+	}
+
 /**
  * redirect method overriding
  *
@@ -806,6 +815,23 @@ class DispatcherTest extends CakeTestCase {
 		$this->assertEqual($controller->params['pass'][0], 'something. .', 'Period was chopped off. %s');
 	}
 
+/**
+ * Test that Dispatcher handles actions that return response objects.
+ *
+ * @return void
+ */
+	public function testDispatchActionReturnsResponse() {
+		$Dispatcher = new Dispatcher();
+		$request = new CakeRequest('some_pages/responseGenerator');
+		$response = $this->getMock('CakeResponse', array('_sendHeader'));
+
+		ob_start();
+		$Dispatcher->dispatch($request, $response);
+		$result = ob_get_clean();
+
+		$this->assertEquals('new response', $result);
+	}
+
 /**
  * testAdminDispatch method
  *