diff --git a/cake/libs/model/cake_schema.php b/cake/libs/model/cake_schema.php
index f72d148b9..ae745c76e 100644
--- a/cake/libs/model/cake_schema.php
+++ b/cake/libs/model/cake_schema.php
@@ -465,6 +465,7 @@ class CakeSchema extends Object {
 					$tables[$table]['drop'] = $diff;
 				}
 			}
+
 			foreach ($fields as $field => $value) {
 				if (isset($old[$table][$field])) {
 					$diff = array_diff_assoc($value, $old[$table][$field]);
diff --git a/cake/libs/model/datasources/dbo_source.php b/cake/libs/model/datasources/dbo_source.php
index dc41588b4..a0135e5d3 100755
--- a/cake/libs/model/datasources/dbo_source.php
+++ b/cake/libs/model/datasources/dbo_source.php
@@ -1658,6 +1658,22 @@ class DboSource extends DataSource {
 		} elseif ($conditions === null) {
 			$conditions = $this->conditions($this->defaultConditions($model, $conditions, false), true, true, $model);
 		} else {
+			$noJoin = true;
+			foreach ($conditions as $field => $value) {
+				$originalField = $field;
+				if (strpos($field, '.') !== false) {
+					list($alias, $field) = explode('.', $field);
+				}
+				if (!$model->hasField($field)) {
+					$noJoin = false;
+					break;
+				}
+				$conditions[$field] = $value;
+				unset($conditions[$originalField]);
+			}
+			if ($noJoin === true) {
+				return $this->conditions($conditions);
+			}
 			$idList = $model->find('all', array(
 				'fields' => "{$model->alias}.{$model->primaryKey}",
 				'conditions' => $conditions
diff --git a/cake/libs/model/model.php b/cake/libs/model/model.php
index 0950afdeb..c1de0d85b 100644
--- a/cake/libs/model/model.php
+++ b/cake/libs/model/model.php
@@ -1429,10 +1429,12 @@ class Model extends Overloadable {
 				}
 
 				if ($this->hasAndBelongsToMany[$assoc]['unique']) {
-					$conditions = array_merge(
-						array($join . '.' . $this->hasAndBelongsToMany[$assoc]['foreignKey'] => $id),
-						(array)$this->hasAndBelongsToMany[$assoc]['conditions']
+					$conditions = array(
+						$join . '.' . $this->hasAndBelongsToMany[$assoc]['foreignKey'] => $id
 					);
+					if (!empty($this->hasAndBelongsToMany[$assoc]['conditions'])) {
+						$conditions = array_merge($conditions, (array)$this->hasAndBelongsToMany[$assoc]['conditions']);
+					}
 					$links = $this->{$join}->find('all', array(
 						'conditions' => $conditions,
 						'recursive' => empty($this->hasAndBelongsToMany[$assoc]['conditions']) ? -1 : 0,
@@ -1456,7 +1458,7 @@ class Model extends Overloadable {
 				}
 
 				if (!empty($newValues)) {
-					$fields =  implode(',', $fields);
+					$fields = implode(',', $fields);
 					$db->insertMulti($this->{$join}, $fields, $newValues);
 				}
 			}
diff --git a/cake/libs/set.php b/cake/libs/set.php
index 516570bab..2042c6fc1 100644
--- a/cake/libs/set.php
+++ b/cake/libs/set.php
@@ -936,6 +936,9 @@ class Set {
 		} else {
 			$keys = Set::extract($data, $path1);
 		}
+		if (empty($keys)) {
+			return array();
+		}
 
 		if (!empty($path2) && is_array($path2)) {
 			$format = array_shift($path2);
@@ -967,7 +970,9 @@ class Set {
 				return $out;
 			}
 		}
-
+		if (empty($vals)) {
+			return array();
+		}
 		return array_combine($keys, $vals);
 	}
 
diff --git a/cake/tests/cases/libs/model/behaviors/containable.test.php b/cake/tests/cases/libs/model/behaviors/containable.test.php
index 9305a2060..898747b02 100644
--- a/cake/tests/cases/libs/model/behaviors/containable.test.php
+++ b/cake/tests/cases/libs/model/behaviors/containable.test.php
@@ -3352,6 +3352,7 @@ class ContainableBehaviorTest extends CakeTestCase {
 
 		$this->assertTrue(empty($this->Article->hasMany['ArticlesTag']));
 	}
+
 /**
  * testResetAssociation method
  *
diff --git a/cake/tests/cases/libs/model/datasources/dbo/dbo_postgres.test.php b/cake/tests/cases/libs/model/datasources/dbo/dbo_postgres.test.php
index 4c1bb7ded..28f9d7338 100644
--- a/cake/tests/cases/libs/model/datasources/dbo/dbo_postgres.test.php
+++ b/cake/tests/cases/libs/model/datasources/dbo/dbo_postgres.test.php
@@ -166,8 +166,8 @@ class DboPostgresTest extends CakeTestCase {
  * @access public
  */
 	var $fixtures = array('core.user', 'core.binary_test', 'core.comment', 'core.article',
-		'core.tag', 'core.articles_tag', 'core.attachment', 'core.person', 'core.post', 'core.author');
-
+		'core.tag', 'core.articles_tag', 'core.attachment', 'core.person', 'core.post', 'core.author',
+	);
 /**
  * Actual DB connection used in testing
  *
@@ -503,16 +503,23 @@ class DboPostgresTest extends CakeTestCase {
 		)');
 		$model =& ClassRegistry::init('datatypes');
 		$schema = new CakeSchema(array('connection' => 'test_suite'));
-		$result = $schema->read(array('connection' => 'test_suite'));
-		$schema->tables = $result['tables']['missing'];
+		$result = $schema->read(array(
+			'connection' => 'test_suite',
+			'models' => array('Datatype')
+		));
+		$schema->tables = array('datatypes' => $result['tables']['datatypes']);
 		$result = $db1->createSchema($schema, 'datatypes');
 		$this->assertNoPattern('/timestamp DEFAULT/', $result);
 		$this->assertPattern('/timestamp\s*,/', $result);
 
 		$db1->query('DROP TABLE ' . $db1->fullTableName('datatypes'));
+
 		$db1->query($result);
-		$result2 = $schema->read(array('connection' => 'test_suite'));
-		$schema->tables = $result2['tables']['missing'];
+		$result2 = $schema->read(array(
+			'connection' => 'test_suite',
+			'models' => array('Datatype')
+		));
+		$schema->tables = array('datatypes' => $result2['tables']['datatypes']);
 		$result2 = $db1->createSchema($schema, 'datatypes');
 		$this->assertEqual($result, $result2);
 
diff --git a/cake/tests/cases/libs/model/model_delete.test.php b/cake/tests/cases/libs/model/model_delete.test.php
index fe69d9c95..6a3b75797 100644
--- a/cake/tests/cases/libs/model/model_delete.test.php
+++ b/cake/tests/cases/libs/model/model_delete.test.php
@@ -618,6 +618,7 @@ class ModelDeleteTest extends BaseModelTest {
 		));
 		$this->assertEqual($result['Monkey'], $expected);
 	}
+
 /**
  * test that beforeDelete returning false can abort deletion.
  *
@@ -634,6 +635,62 @@ class ModelDeleteTest extends BaseModelTest {
 		$exists = $Model->findById(1);
 		$this->assertTrue(is_array($exists));
 	}
+
+/**
+ * test for a habtm deletion error that occurs in postgres but should not.
+ * And should not occur in any dbo.
+ *
+ * @return void
+ */
+	function testDeleteHabtmPostgresFailure() {
+		$this->loadFixtures('Article', 'Tag', 'ArticlesTag');
+
+		$Article =& ClassRegistry::init('Article');
+		$Article->hasAndBelongsToMany['Tag']['unique'] = true;
+
+		$Tag =& ClassRegistry::init('Tag');
+		$Tag->bindModel(array('hasAndBelongsToMany' => array(
+			'Article' => array(
+				'className' => 'Article',
+				'unique' => true
+			)
+		)), true);
+
+		// Article 1 should have Tag.1 and Tag.2
+	    $before = $Article->find("all", array(
+			"conditions" => array("Article.id" => 1),
+		));
+		$this->assertEqual(count($before[0]['Tag']), 2, 'Tag count for Article.id = 1 is incorrect, should be 2 %s');
+
+		// From now on, Tag #1 is only associated with Post #1
+		$submitted_data = array(
+			"Tag" => array("id" => 1, 'tag' => 'tag1'),
+			"Article" => array(
+				"Article" => array(1)
+			)
+		);
+		$Tag->save($submitted_data);
+
+	    // One more submission (The other way around) to make sure the reverse save looks good.
+	    $submitted_data = array(
+			"Article" => array("id" => 2, 'title' => 'second article'),
+			"Tag" => array(
+				"Tag" => array(2, 3)
+			)
+		);
+	    // ERROR:
+	    // Postgresql: DELETE FROM "articles_tags" WHERE tag_id IN ('1', '3')
+	    // MySQL: DELETE `ArticlesTag` FROM `articles_tags` AS `ArticlesTag` WHERE `ArticlesTag`.`article_id` = 2 AND `ArticlesTag`.`tag_id` IN (1, 3)
+	    $Article->save($submitted_data);
+
+		// Want to make sure Article #1 has Tag #1 and Tag #2 still.
+		$after = $Article->find("all", array(
+			"conditions" => array("Article.id" => 1),
+		));
+
+		// Removing Article #2 from Tag #1 is all that should have happened.
+		$this->assertEqual(count($before[0]["Tag"]), count($after[0]["Tag"]));
+	}
 }
 
 ?>
\ No newline at end of file
diff --git a/cake/tests/cases/libs/model/model_write.test.php b/cake/tests/cases/libs/model/model_write.test.php
index ba488403a..dc757d576 100644
--- a/cake/tests/cases/libs/model/model_write.test.php
+++ b/cake/tests/cases/libs/model/model_write.test.php
@@ -328,6 +328,7 @@ class ModelWriteTest extends BaseModelTest {
 
 		$data = array(
 			'OverallFavorite' => array(
+				'id' => 22,
 		 		'model_type' => '8-track',
 				'model_id' => '3',
 				'priority' => '1'
@@ -391,6 +392,7 @@ class ModelWriteTest extends BaseModelTest {
 		$User = new CounterCacheUser();
 		$Post = new CounterCachePost();
 		$data = array('Post' => array(
+			'id' => 22,
 			'title' => 'New Post',
 			'user_id' => 66
 		));
@@ -1611,7 +1613,7 @@ class ModelWriteTest extends BaseModelTest {
 				'DoomedSomethingElse' => array(
 					'className' => 'SomethingElse',
 					'joinTable' => 'join_things',
-					'conditions' => 'JoinThing.doomed = 1',
+					'conditions' => 'JoinThing.doomed = true',
 					'unique' => true
 				),
 				'NotDoomedSomethingElse' => array(
diff --git a/cake/tests/cases/libs/set.test.php b/cake/tests/cases/libs/set.test.php
index 3b6018c2e..f09279ea4 100644
--- a/cake/tests/cases/libs/set.test.php
+++ b/cake/tests/cases/libs/set.test.php
@@ -1653,6 +1653,9 @@ class SetTest extends CakeTestCase {
 		$result = Set::combine($b, 'users.{n}.User.id', 'users.{n}.User.non-existant');
 		$expected = array(2 => null, 14 => null, 25 => null);
 		$this->assertIdentical($result, $expected);
+
+		$result = Set::combine($a, 'fail', 'fail');
+		$this->assertEqual($result, array());
 	}
 
 /**