diff --git a/cake/libs/class_registry.php b/cake/libs/class_registry.php
index 8fdd4656b..3e2ced4b6 100644
--- a/cake/libs/class_registry.php
+++ b/cake/libs/class_registry.php
@@ -116,7 +116,6 @@ class ClassRegistry {
 			if (is_array($settings)) {
 				$plugin = null;
 				$settings = array_merge($defaults, $settings);
-
 				extract($settings, EXTR_OVERWRITE);
 
 				if (strpos($class, '.') !== false) {
@@ -128,9 +127,9 @@ class ClassRegistry {
 					$alias = $class;
 				}
 
-				if ($_this->_duplicate($alias, $class) && $count == 1) {
+				if ($model =& $_this->_duplicate($alias, $class)) {
 					$_this->map($alias, $class);
-					return $_this->getObject($alias);
+					return $model;
 				}
 
 				if ($type === 'Model') {
@@ -236,7 +235,6 @@ class ClassRegistry {
 	function &getObject($key) {
 		$_this =& ClassRegistry::getInstance();
 		$key = Inflector::underscore($key);
-
 		if (isset($_this->__objects[$key])) {
 			return $_this->__objects[$key];
 		} else {
@@ -282,18 +280,17 @@ class ClassRegistry {
 	function _duplicate($alias,  $class) {
 		$_this =& ClassRegistry::getInstance();
 		$duplicate = false;
-
 		if ($_this->isKeySet($alias)) {
-			$model = $_this->getObject($alias);
-			if (is_a($model, $class)) {
-				$duplicate = true;
+			$model =& $_this->getObject($alias);
+			if ($model->name === $class) {
+				$duplicate =& $model;
 			}
 			unset($model);
 		}
 		return $duplicate;
 	}
 /**
- * Add a key name pair to the registry to map name to class in the regisrty.
+ * Add a key name pair to the registry to map name to class in the registry.
  *
  * @param string $key Key to include in map
  * @param string $name Key that is being mapped
diff --git a/cake/libs/model/connection_manager.php b/cake/libs/model/connection_manager.php
index 87375bacb..5ac2d0eb5 100644
--- a/cake/libs/model/connection_manager.php
+++ b/cake/libs/model/connection_manager.php
@@ -98,12 +98,13 @@ class ConnectionManager extends Object {
 	function &getDataSource($name) {
 		$_this =& ConnectionManager::getInstance();
 
-		if (in_array($name, array_keys($_this->_dataSources))) {
-			return $_this->_dataSources[$name];
+		if (!empty($_this->_dataSources[$name])) {
+			$return =& $_this->_dataSources[$name];
+			return $return;
 		}
 
 		$connections = $_this->enumConnectionObjects();
-		if (in_array($name, array_keys($connections))) {
+		if (!empty($connections[$name])) {
 			$conn = $connections[$name];
 			$class = $conn['classname'];
 			$_this->loadDataSource($name);
@@ -114,7 +115,8 @@ class ConnectionManager extends Object {
 			return null;
 		}
 
-		return $_this->_dataSources[$name];
+		$return =& $_this->_dataSources[$name];
+		return $return;
 	}
 /**
  * Gets the list of available DataSource connections
@@ -164,7 +166,7 @@ class ConnectionManager extends Object {
 			$conn = $connections[$connName];
 		}
 
-		if (isset($conn['parent']) && !empty($conn['parent'])) {
+		if (!empty($conn['parent'])) {
 			$_this->loadDataSource($conn['parent']);
 		}
 
@@ -225,7 +227,8 @@ class ConnectionManager extends Object {
 
 		$_this->config->{$name} = $config;
 		$_this->_connectionsEnum[$name] = $_this->__getDriver($config);
-		return $_this->getDataSource($name);
+		$return =& $_this->getDataSource($name);
+		return $return;
 	}
 /**
  * Returns the file, class name, and parent for the given driver.
@@ -262,5 +265,4 @@ class ConnectionManager extends Object {
 		}
 	}
 }
-
 ?>
\ No newline at end of file
diff --git a/cake/libs/model/datasources/datasource.php b/cake/libs/model/datasources/datasource.php
index cd04395da..38c66ca57 100644
--- a/cake/libs/model/datasources/datasource.php
+++ b/cake/libs/model/datasources/datasource.php
@@ -193,7 +193,8 @@ class DataSource extends Object {
 		if ($this->cacheSources === false) {
 			return null;
 		}
-		if ($this->_sources != null) {
+
+		if ($this->_sources !== null) {
 			return $this->_sources;
 		}
 
@@ -213,9 +214,11 @@ class DataSource extends Object {
  *
  * @return array
  */
-	function sources() {
-		$return = array_map('strtolower', $this->listSources());
-		return $return;
+	function sources($reset = false) {
+		if ($reset === true) {
+			$this->_sources = null;
+		}
+		return array_map('strtolower', $this->listSources());
 	}
 /**
  * Returns a Model description (metadata) or null if none found.
diff --git a/cake/libs/model/datasources/dbo_source.php b/cake/libs/model/datasources/dbo_source.php
index a68757cc1..2744f1f08 100644
--- a/cake/libs/model/datasources/dbo_source.php
+++ b/cake/libs/model/datasources/dbo_source.php
@@ -511,7 +511,7 @@ class DboSource extends DataSource {
 			} else {
 				$out = ("<small>[Aff:{$this->affected} Num:{$this->numRows} Took:{$this->took}ms]</small>");
 			}
-			e(sprintf("<p style = \"text-align:left\"><b>Query:</b> %s %s</p>", $sql, $out));
+			pr(sprintf("<p style = \"text-align:left\"><b>Query:</b> %s %s</p>", $sql, $out));
 		}
 	}
 /**
@@ -2412,5 +2412,4 @@ class DboSource extends DataSource {
 		return 'string';
 	}
 }
-
-?>
+?>
\ No newline at end of file
diff --git a/cake/libs/model/model.php b/cake/libs/model/model.php
index c4a17ec7b..6977bf597 100644
--- a/cake/libs/model/model.php
+++ b/cake/libs/model/model.php
@@ -2012,9 +2012,9 @@ class Model extends Overloadable {
 					$root = $return[0][$this->alias]['parent_id'];
 					foreach ($return as $key => $value) {
 						if ($value[$this->alias]['parent_id'] != $root) {
-							unset ($return[$key]);	
+							unset($return[$key]);
 						}
-					}	
+					}
 				}
 			}
 			return $return;
@@ -2678,4 +2678,4 @@ class Model extends Overloadable {
 if (!defined('CAKEPHP_UNIT_TEST_EXECUTION')) {
 	Overloadable::overload('Model');
 }
-?>
+?>
\ No newline at end of file
diff --git a/cake/tests/cases/libs/model/behaviors/acl.test.php b/cake/tests/cases/libs/model/behaviors/acl.test.php
index fdb360af0..3b9f298b1 100644
--- a/cake/tests/cases/libs/model/behaviors/acl.test.php
+++ b/cake/tests/cases/libs/model/behaviors/acl.test.php
@@ -38,31 +38,31 @@ App::import('Core', 'db_acl');
 class AclPerson extends CakeTestModel {
 /**
  * name property
- * 
- * @var string 
+ *
+ * @var string
  * @access public
  */
 	var $name = 'AclPerson';
 /**
  * useTable property
- * 
- * @var string 
+ *
+ * @var string
  * @access public
  */
 	var $useTable = 'people';
 /**
  * actsAs property
- * 
+ *
  * @var array
  * @access public
- */	
+ */
 	var $actsAs = array('Acl' => 'requester');
 /**
  * belongsTo property
- * 
+ *
  * @var array
  * @access public
- */	
+ */
 	var $belongsTo = array(
 		'Mother' => array(
 			'className' => 'AclPerson',
@@ -71,10 +71,10 @@ class AclPerson extends CakeTestModel {
 	);
 /**
  * hasMany property
- * 
+ *
  * @var array
  * @access public
- */	
+ */
 	var $hasMany = array(
 		'Child' => array(
 			'className' => 'AclPerson',
@@ -86,7 +86,7 @@ class AclPerson extends CakeTestModel {
  * ParentNode
  *
  * @return void
- **/	
+ **/
 	function parentNode() {
 		if (!$this->id && empty($this->data)) {
 			return null;
@@ -94,14 +94,14 @@ class AclPerson extends CakeTestModel {
 		$data = $this->data;
 		if (empty($this->data)) {
 			$data = $this->read();
-		} 
+		}
 		if (!$data['AclPerson']['mother_id']) {
 			return null;
 		} else {
 			return array('AclPerson' => array('id' => $data['AclPerson']['mother_id']));
-		}		
+		}
 	}
-	
+
 }
 
 /**
@@ -113,30 +113,30 @@ class AclPerson extends CakeTestModel {
 class AclUser extends CakeTestModel {
 /**
  * name property
- * 
- * @var string 
+ *
+ * @var string
  * @access public
  */
 	var $name = 'User';
 /**
  * useTable property
- * 
- * @var string 
+ *
+ * @var string
  * @access public
  */
 	var $useTable = 'users';
 /**
  * actsAs property
- * 
+ *
  * @var array
  * @access public
- */	
+ */
 	var $actsAs = array('Acl');
 /**
- * parentNode 
- * 
+ * parentNode
+ *
  * @access public
- */	
+ */
 	function parentNode() {
 		return null;
 	}
@@ -151,30 +151,30 @@ class AclUser extends CakeTestModel {
 class AclPost extends CakeTestModel {
 /**
  * name property
- * 
- * @var string 
+ *
+ * @var string
  * @access public
  */
 	var $name = 'Post';
 /**
  * useTable property
- * 
- * @var string 
+ *
+ * @var string
  * @access public
  */
 	var $useTable = 'posts';
 /**
  * actsAs property
- * 
+ *
  * @var array
  * @access public
- */	
+ */
 	var $actsAs = array('Acl' => 'controlled');
 /**
- * parentNode 
- * 
+ * parentNode
+ *
  * @access public
- */	
+ */
 	function parentNode() {
 		return null;
 	}
@@ -196,11 +196,11 @@ class AclBehaviorTestCase extends CakeTestCase {
  **/
 	function startTest() {
 		Configure::write('Acl.database', 'test_suite');
-		
-		$this->Aco = new Aco();
-		$this->Aro = new Aro();
+
+		$this->Aco =& new Aco();
+		$this->Aro =& new Aro();
 	}
-	
+
 /**
  * Test Setup of AclBehavior
  *
@@ -211,13 +211,13 @@ class AclBehaviorTestCase extends CakeTestCase {
 		$this->assertTrue(isset($User->Behaviors->Acl->settings['User']));
 		$this->assertEqual($User->Behaviors->Acl->settings['User']['type'], 'requester');
 		$this->assertTrue(is_object($User->Aro));
-		
+
 		$Post =& new AclPost();
 		$this->assertTrue(isset($Post->Behaviors->Acl->settings['Post']));
 		$this->assertEqual($Post->Behaviors->Acl->settings['Post']['type'], 'controlled');
 		$this->assertTrue(is_object($Post->Aco));
 	}
-	
+
 /**
  * test After Save
  *
@@ -230,15 +230,15 @@ class AclBehaviorTestCase extends CakeTestCase {
 				'author_id' => 1,
 				'title' => 'Acl Post',
 				'body' => 'post body',
-				'published' => 1			
-			),		
+				'published' => 1
+			),
 		);
 		$Post->save($data);
 		$result = $this->Aco->find('first', array('conditions' => array('Aco.model' => 'Post', 'Aco.foreign_key' => $Post->id)));
 		$this->assertTrue(is_array($result));
 		$this->assertEqual($result['Aco']['model'], 'Post');
 		$this->assertEqual($result['Aco']['foreign_key'], $Post->id);
-		
+
 		$aroData = array(
 			'Aro' => array(
 				'model' => 'AclPerson',
@@ -247,7 +247,7 @@ class AclBehaviorTestCase extends CakeTestCase {
 			)
 		);
 		$this->Aro->save($aroData);
-				
+
 		$Person =& new AclPerson();
 		$data = array(
 			'AclPerson' => array(
@@ -255,18 +255,18 @@ class AclBehaviorTestCase extends CakeTestCase {
 				'mother_id' => 2,
 				'father_id' => 3,
 			),
-		);		
+		);
 		$Person->save($data);
 		$result = $this->Aro->find('first', array('conditions' => array('Aro.model' => 'AclPerson', 'Aro.foreign_key' => $Person->id)));
 		$this->assertTrue(is_array($result));
 		$this->assertEqual($result['Aro']['parent_id'], 5);
-	
+
 		$node = $Person->node(array('model' => 'AclPerson', 'foreign_key' => 8));
 		$this->assertEqual(sizeof($node), 2);
 		$this->assertEqual($node[0]['Aro']['parent_id'], 5);
 		$this->assertEqual($node[1]['Aro']['parent_id'], null);
 	}
-	
+
 /**
  * Test After Delete
  *
@@ -280,7 +280,7 @@ class AclBehaviorTestCase extends CakeTestCase {
 				'parent_id' => null
 			)
 		);
-		$this->Aro->save($aroData);		
+		$this->Aro->save($aroData);
 		$Person =& new AclPerson();
 		$data = array(
 			'AclPerson' => array(
@@ -288,38 +288,38 @@ class AclBehaviorTestCase extends CakeTestCase {
 				'mother_id' => 2,
 				'father_id' => 3,
 			),
-		);		
-		$Person->save($data);	
+		);
+		$Person->save($data);
 		$id = $Person->id;
 		$node = $Person->node();
 		$this->assertEqual(sizeof($node), 2);
 		$this->assertEqual($node[0]['Aro']['parent_id'], 5);
 		$this->assertEqual($node[1]['Aro']['parent_id'], null);
-		
+
 		$Person->delete($id);
 		$result = $this->Aro->find('first', array('conditions' => array('Aro.model' => 'AclPerson', 'Aro.foreign_key' => $id)));
-		$this->assertTrue(empty($result));		
+		$this->assertTrue(empty($result));
 		$result = $this->Aro->find('first', array('conditions' => array('Aro.model' => 'AclPerson', 'Aro.foreign_key' => 2)));
 		$this->assertFalse(empty($result));
-		
+
 		$data = array(
 			'AclPerson' => array(
 				'name' => 'Trent',
 				'mother_id' => 2,
 				'father_id' => 3,
 			),
-		);		
+		);
 		$Person->save($data);
 		$id = $Person->id;
 		$Person->delete(2);
 		$result = $this->Aro->find('first', array('conditions' => array('Aro.model' => 'AclPerson', 'Aro.foreign_key' => $id)));
-		$this->assertTrue(empty($result));		
-		
+		$this->assertTrue(empty($result));
+
 		$result = $this->Aro->find('first', array('conditions' => array('Aro.model' => 'AclPerson', 'Aro.foreign_key' => 2)));
 		$this->assertTrue(empty($result));
-		
+
 	}
-	
+
 /**
  * Test Node()
  *
@@ -335,13 +335,13 @@ class AclBehaviorTestCase extends CakeTestCase {
 			)
 		);
 		$this->Aro->save($aroData);
-		
+
 		$Person->id = 2;
 		$result = $Person->node();
 		$this->assertTrue(is_array($result));
 		$this->assertEqual(sizeof($result), 1);
 	}
-	
+
 /**
  * tear down test
  *
@@ -351,6 +351,6 @@ class AclBehaviorTestCase extends CakeTestCase {
 		ClassRegistry::flush();
 		unset($this->Aro, $this->Aco);
 	}
-		
+
 }
-?>
+?>
\ No newline at end of file
diff --git a/cake/tests/cases/libs/model/datasources/dbo_source.test.php b/cake/tests/cases/libs/model/datasources/dbo_source.test.php
index 4ab9013c8..4077cf577 100644
--- a/cake/tests/cases/libs/model/datasources/dbo_source.test.php
+++ b/cake/tests/cases/libs/model/datasources/dbo_source.test.php
@@ -1169,6 +1169,7 @@ class DboSourceTest extends CakeTestCase {
 		}
 
 		$this->testDb =& new DboTest($this->__config);
+		$this->testDb->cacheSources = false;
 		Configure::write('debug', 1);
 		$this->debug = Configure::read('debug');
 		$this->Model =& new TestModel();
@@ -3489,17 +3490,17 @@ class DboSourceTest extends CakeTestCase {
 		$Apple =& ClassRegistry::init('Apple');
 		$Article =& ClassRegistry::init('Article');
 
-		$result = $this->db->rawQuery('SELECT color, name FROM ' . $this->testDb->fullTableName('apples'));
+		$result = $this->testDb->rawQuery('SELECT color, name FROM ' . $this->testDb->fullTableName('apples'));
 		$this->assertTrue(!empty($result));
 
-		$result = $this->db->fetchRow($result);
+		$result = $this->testDb->fetchRow($result);
 		$expected = array($this->testDb->fullTableName('apples', false) => array(
 			'color' => 'Red 1',
 			'name' => 'Red Apple 1'
 		));
 		$this->assertEqual($result, $expected);
 
-		$result = $this->db->fetchAll('SELECT name FROM ' . $this->testDb->fullTableName('apples') . ' ORDER BY id');
+		$result = $this->testDb->fetchAll('SELECT name FROM ' . $this->testDb->fullTableName('apples') . ' ORDER BY id');
 		$expected = array(
 			array($this->testDb->fullTableName('apples', false) => array('name' => 'Red Apple 1')),
 			array($this->testDb->fullTableName('apples', false) => array('name' => 'Bright Red Apple')),
@@ -3511,7 +3512,7 @@ class DboSourceTest extends CakeTestCase {
 		);
 		$this->assertEqual($result, $expected);
 
-		$result = $this->db->field($this->testDb->fullTableName('apples', false), 'SELECT color, name FROM ' . $this->testDb->fullTableName('apples') . ' ORDER BY id');
+		$result = $this->testDb->field($this->testDb->fullTableName('apples', false), 'SELECT color, name FROM ' . $this->testDb->fullTableName('apples') . ' ORDER BY id');
 		$expected = array(
 			'color' => 'Red 1',
 			'name' => 'Red Apple 1'
@@ -3519,7 +3520,7 @@ class DboSourceTest extends CakeTestCase {
 		$this->assertEqual($result, $expected);
 
 		$Apple->unbindModel(array(), false);
-		$result = $this->db->read($Apple, array(
+		$result = $this->testDb->read($Apple, array(
 			'fields' => array($Apple->escapeField('name')),
 			'conditions' => null,
 			'recursive' => -1
@@ -3535,7 +3536,7 @@ class DboSourceTest extends CakeTestCase {
 		);
 		$this->assertEqual($result, $expected);
 
-		$result = $this->db->read($Article, array(
+		$result = $this->testDb->read($Article, array(
 			'fields' => array('id', 'user_id', 'title'),
 			'conditions' => null,
 			'recursive' => 1
@@ -3629,6 +3630,6 @@ class DboSourceTest extends CakeTestCase {
 		$this->testDb->error = $oldError;
 		Configure::write('debug', $oldDebug);
 	}
-}
 
+}
 ?>
\ No newline at end of file
diff --git a/cake/tests/cases/libs/model/model.test.php b/cake/tests/cases/libs/model/model.test.php
index 7127bf184..292bbf092 100644
--- a/cake/tests/cases/libs/model/model.test.php
+++ b/cake/tests/cases/libs/model/model.test.php
@@ -5556,5 +5556,4 @@ class ModelTest extends CakeTestCase {
 		ClassRegistry::flush();
 	}
 }
-
-?>
+?>
\ No newline at end of file
diff --git a/cake/tests/cases/libs/model/schema.test.php b/cake/tests/cases/libs/model/schema.test.php
index 6b5e4aa95..d1969579d 100644
--- a/cake/tests/cases/libs/model/schema.test.php
+++ b/cake/tests/cases/libs/model/schema.test.php
@@ -318,42 +318,20 @@ class SchemaDatatype extends CakeTestModel {
  */
 	var $useTable = 'datatypes';
 }
-/**
- * PostsTag class
- *
- * @package              cake
- * @subpackage           cake.tests.cases.libs.model
- */
-class PostsTag extends CakeTestModel {
-/**
- * name property
- *
- * @var string 'PostsTag'
- * @access public
- */
-	var $name = 'PostsTag';
-/**
- * useTable property
- *
- * @var string 'posts_tags'
- * @access public
- */
-	var $useTable = 'posts_tags';
-}
 /**
  * Testdescribe class
  *
- * This class is defined purely to inherit the cacheSources variable otherwise testSchemaCreatTable will fail if 
+ * This class is defined purely to inherit the cacheSources variable otherwise testSchemaCreatTable will fail if
  * listSources has already been called and its source cache populated - I.e. if the test is run within a group
- * 
+ *
  * @uses                 CakeTestModel
- * @package              
+ * @package
  * @subpackage           cake.tests.cases.libs.model
  */
 class Testdescribe extends CakeTestModel {
 /**
  * name property
- * 
+ *
  * @var string 'Testdescribe'
  * @access public
  */
@@ -417,7 +395,6 @@ class CakeSchemaTest extends CakeTestCase {
  * @return void
  */
 	function testSchemaWrite() {
-
 		$write = $this->Schema->write(array('name' => 'MyOtherApp', 'tables' => $this->Schema->tables, 'path' => TMP . 'tests'));
 		$file = file_get_contents(TMP . 'tests' . DS .'schema.php');
 		$this->assertEqual($write, $file);
@@ -475,6 +452,8 @@ class CakeSchemaTest extends CakeTestCase {
  */
 	function testSchemaCreateTable() {
 		$db =& ConnectionManager::getDataSource('test_suite');
+		$db->cacheSources = false;
+
 		$db->query('CREATE TABLE ' . $db->fullTableName('testdescribes') . ' (id int(11) AUTO_INCREMENT, int_null int(10) unsigned NULL, int_not_null int(10) unsigned NOT NULL, primary key(id));');
 
 		$Schema =& new CakeSchema(array('connection' => 'test_suite'));
@@ -499,4 +478,4 @@ class CakeSchemaTest extends CakeTestCase {
 		unset($this->Schema);
 	}
 }
-?>
+?>
\ No newline at end of file
diff --git a/cake/tests/lib/cake_test_case.php b/cake/tests/lib/cake_test_case.php
index 186fce9a1..2646aa99c 100644
--- a/cake/tests/lib/cake_test_case.php
+++ b/cake/tests/lib/cake_test_case.php
@@ -371,6 +371,7 @@ class CakeTestCase extends UnitTestCase {
  */
 	function start() {
 		if (isset($this->_fixtures) && isset($this->db)) {
+			Configure::write('Cache.disable', true);
 			$cacheSources = $this->db->cacheSources;
 			$this->db->cacheSources = false;
 			$sources = $this->db->listSources();
@@ -395,6 +396,12 @@ class CakeTestCase extends UnitTestCase {
 			foreach (array_reverse($this->_fixtures) as $fixture) {
 				$fixture->drop($this->db);
 			}
+			$this->db->sources(true);
+			Configure::write('Cache.disable', false);
+		}
+
+		if (class_exists('ClassRegistry')) {
+			ClassRegistry::flush();
 		}
 	}
 /**
@@ -730,4 +737,4 @@ class CakeTestCase extends UnitTestCase {
 		}
 	}
 }
-?>
+?>
\ No newline at end of file