diff --git a/cake/libs/configure.php b/cake/libs/configure.php
index a9ee31d4e..1e1b6349d 100644
--- a/cake/libs/configure.php
+++ b/cake/libs/configure.php
@@ -588,14 +588,14 @@ class Configure extends Object {
 				$cache = Cache::settings();
 				if(empty($cache)) {
 					trigger_error('Cache not configured properly. Please check Cache::config(); in APP/config/core.php', E_USER_WARNING);
-					Cache::config('default', array('engine' => 'File'));
-					$cache = Cache::settings();
+					list($engine, $cache) = Cache::config('default', array('engine' => 'File'));
 				}
-				$settings = array('prefix' => 'cake_core_', 'path' => CACHE . 'persistent' . DS);
 				if (Configure::read() > 1) {
-					$settings = array('prefix' => 'cake_core_', 'duration' => 10, 'path' => CACHE . 'persistent' . DS);
+					$cache['duration'] = 10;
 				}
-				Cache::config('_cake_core_' , array_merge($cache, $settings));
+
+				$settings = array('prefix' => 'cake_core_', 'path' => CACHE . 'persistent' . DS, 'serialize' => true);
+ 				$config = Cache::config('_cake_core_' , array_merge($cache, $settings));
 			}
 		}
 
diff --git a/cake/libs/model/db_acl.php b/cake/libs/model/db_acl.php
index 3eba5ee9c..22a757305 100644
--- a/cake/libs/model/db_acl.php
+++ b/cake/libs/model/db_acl.php
@@ -125,15 +125,18 @@ class AclNode extends AppModel {
 			$ref = array('model' => $ref->alias, 'foreign_key' => $ref->id);
 		} elseif (is_array($ref) && !(isset($ref['model']) && isset($ref['foreign_key']))) {
 			$name = key($ref);
-			if (!ClassRegistry::isKeySet($name)) {
-				if (!App::import($name)) {
-					trigger_error("Model class '$name' not found in AclNode::node() when trying to bind {$this->alias} object", E_USER_WARNING);
-					return null;
-				}
-				$model =& ClassRegistry::init(array('class' => $name, 'alias' => $name));
+
+			if(PHP5) {
+				$model = ClassRegistry::init(array('class' => $name, 'alias' => $name));
 			} else {
-				$model =& ClassRegistry::getObject($name);
+				$model =& ClassRegistry::init(array('class' => $name, 'alias' => $name));
 			}
+
+			if (empty($model)) {
+				trigger_error("Model class '$name' not found in AclNode::node() when trying to bind {$this->alias} object", E_USER_WARNING);
+				return null;
+			}
+
 			$tmpRef = null;
 			if (method_exists($model, 'bindNode')) {
 				$tmpRef = $model->bindNode($ref);