diff --git a/administrator/components/com_menus/models/items.php b/administrator/components/com_menus/models/items.php
index 7e8b439a75e76..de7daf43fd476 100644
--- a/administrator/components/com_menus/models/items.php
+++ b/administrator/components/com_menus/models/items.php
@@ -168,7 +168,7 @@ protected function getListQuery()
 		$app	= JFactory::getApplication();
 
 		// Select all fields from the table.
-		$query->select($this->getState('list.select', 'a.id, a.menutype, a.title, a.alias, a.note, a.path, a.link, a.type, a.parent_id, a.level, a.published as apublished, a.component_id, a.ordering, a.checked_out, a.checked_out_time, a.browserNav, a.access, a.img, a.template_style_id, a.params, a.lft, a.rgt, a.home, a.language, a.client_id'));
+		$query->select($this->getState('list.select', 'a.id, a.menutype, a.title, a.alias, a.note, a.path, a.link, a.type, a.parent_id, a.level, a.published as apublished, a.component_id, a.ordering, a.checked_out, a.checked_out_time, a."browserNav", a.access, a.img, a.template_style_id, a.params, a.lft, a.rgt, a.home, a.language, a.client_id'));
 		$query->select('CASE a.type' .
 			' WHEN ' . $db->quote('component') . ' THEN a.published+2*(e.enabled-1) ' .
 			' WHEN ' . $db->quote('url') . ' THEN a.published+2 ' .
diff --git a/installation/sql/postgresql/joomla.sql b/installation/sql/postgresql/joomla.sql
index d15949cdedddc..cd8c4fb1bff95 100644
--- a/installation/sql/postgresql/joomla.sql
+++ b/installation/sql/postgresql/joomla.sql
@@ -1703,7 +1703,7 @@ CREATE TABLE "#__menu" (
   "img" character varying(255) DEFAULT '' NOT NULL,
   "template_style_id" integer DEFAULT 0 NOT NULL,
   -- JSON encoded data for the menu item.
-  "params" text NOT NULL,
+  "params" text DEFAULT '' NOT NULL,
   -- Nested set lft.
   "lft" bigint DEFAULT 0 NOT NULL,
   -- Nested set rgt.
@@ -2385,4 +2385,4 @@ BEGIN
  
   RETURN soundex;
 END;
-$$;
\ No newline at end of file
+$$;
diff --git a/libraries/joomla/database/database.php b/libraries/joomla/database/database.php
index a4678f4f3a8d8..5950dcf37be45 100644
--- a/libraries/joomla/database/database.php
+++ b/libraries/joomla/database/database.php
@@ -838,7 +838,8 @@ public function insertObject($table, &$object, $key = null)
 		$values = array();
 
 		// Create the base insert statement.
-		$statement = 'INSERT INTO ' . $this->quoteName($table) . ' (%s) VALUES (%s)';
+		$query = $this->getQuery(true);
+		$query->insert($this->quoteName($table));
 
 		// Iterate over the object variables to build the query fields and values.
 		foreach (get_object_vars($object) as $k => $v)
@@ -857,11 +858,14 @@ public function insertObject($table, &$object, $key = null)
 
 			// Prepare and sanitize the fields and values for the database query.
 			$fields[] = $this->quoteName($k);
-			$values[] = $this->quote($v);
+			$values[] = is_numeric($v) ? $v : $this->quote($v);
 		}
 
+		$query->columns($fields);
+		$query->values(implode(',', $values));
+
 		// Set the query and execute the insert.
-		$this->setQuery(sprintf($statement, implode(',', $fields), implode(',', $values)));
+		$this->setQuery($query);
 		if (!$this->query())
 		{
 			return false;
@@ -1618,7 +1622,7 @@ public function updateObject($table, &$object, $key, $nulls = false)
 			// Set the primary key to the WHERE clause instead of a field to update.
 			if ($k == $key)
 			{
-				$where = $this->quoteName($k) . '=' . $this->quote($v);
+				$where = $this->quoteName($k) . '=' . (is_numeric($v) ? $v : $this->quote($v));
 				continue;
 			}
 
@@ -1639,7 +1643,7 @@ public function updateObject($table, &$object, $key, $nulls = false)
 			// The field is not null so we prep it for update.
 			else
 			{
-				$val = $this->quote($v);
+				$val = (is_numeric($v) ? $v : $this->quote($v));
 			}
 
 			// Add the field to be updated.
diff --git a/libraries/joomla/database/database/postgresql.php b/libraries/joomla/database/database/postgresql.php
index 9bcdcdd13d54a..4bad397baaae9 100644
--- a/libraries/joomla/database/database/postgresql.php
+++ b/libraries/joomla/database/database/postgresql.php
@@ -233,7 +233,7 @@ public function getCollation()
 	 */
 	public function getNumRows( $cur = null )
 	{
-		return pg_num_rows($cur ? $cur : $this->cursor);
+		return pg_num_rows((int)$cur ? $cur : $this->cursor);
 	}
 
 	/**
@@ -450,10 +450,6 @@ public function insertObject($table, &$object, $key = null)
 		$fields = array();
 		$values = array();
 
-		// Create the base insert statement.
-		$query = $this->getQuery(true);
-		$query->insert($this->quoteName($table));
-
 		// Iterate over the object variables to build the query fields and values.
 		foreach (get_object_vars($object) as $k => $v)
 		{
@@ -474,24 +470,35 @@ public function insertObject($table, &$object, $key = null)
 			$values[] = is_numeric($v) ? $v : $this->quote($v);
 		}
 
-		$query->columns($fields);
-		$query->values(implode(',', $values));
+		// Create the base insert statement.
+		$query = $this->getQuery(true);
+		
+		$query->insert($this->quoteName($table))
+				->columns($fields)
+				->values(implode(',', $values));
 
+		if ($key)
+		{
+			$query->returning($key);
+		}
+		
 		// Set the query and execute the insert.
 		$this->setQuery($query);
-		if (!$this->query())
+		
+		if ($key)
 		{
+			$id = $this->loadResult();
+			if ($id) 
+			{
+				$object->$key = $id;
+				return true;
+			} 
 			return false;
-		}
-
-		// Update the primary key if it exists.
-		$id = $this->insertid();
-		if ($key && $id)
+		} 
+		else 
 		{
-			$object->$key = $id;
+			return $this->query();
 		}
-
-		return true;
 	}
 
 	/**
diff --git a/libraries/joomla/database/table/user.php b/libraries/joomla/database/table/user.php
index 51b3cab1a1953..0d906a04f0df1 100644
--- a/libraries/joomla/database/table/user.php
+++ b/libraries/joomla/database/table/user.php
@@ -181,6 +181,12 @@ public function bind($array, $ignore = '')
 	 */
 	public function check()
 	{
+		// Set user id to null istead of 0, if needed
+		if ($this->id === 0)
+		{
+			$this->id = null;
+		}
+		
 		// Validate user information
 		if (trim($this->name) == '')
 		{
@@ -207,11 +213,16 @@ public function check()
 		}
 
 		// Set the registration timestamp
-		if ($this->registerDate == null || $this->registerDate == $this->_db->getNullDate())
+		if (empty($this->registerDate) || $this->registerDate == $this->_db->getNullDate())
 		{
 			$this->registerDate = JFactory::getDate()->toSql();
 		}
-
+		// Set the lastvisitDate timestamp
+		if (empty($this->lastvisitDate))
+		{
+			$this->lastvisitDate = $this->_db->getNullDate();
+		}
+		
 		// check for existing username
 		$query = $this->_db->getQuery(true);
 		$query->select($this->_db->quoteName('id'));
diff --git a/libraries/joomla/installer/adapters/component.php b/libraries/joomla/installer/adapters/component.php
index f1428a6e870eb..7d9f17121d010 100644
--- a/libraries/joomla/installer/adapters/component.php
+++ b/libraries/joomla/installer/adapters/component.php
@@ -541,11 +541,11 @@ public function install()
 			return false;
 		}
 
-		$eid = $db->insertid();
+		$eid = $row->extension_id;
 
 		// Clobber any possible pending updates
 		$update = JTable::getInstance('update');
-		$uid = $update->find(array('element' => $this->get('element'), 'type' => 'component', 'client_id' => '', 'folder' => ''));
+		$uid = $update->find(array('element' => $this->get('element'), 'type' => 'component', 'client_id' => 1, 'folder' => ''));
 
 		if ($uid)
 		{
@@ -1021,7 +1021,7 @@ public function update()
 
 		// Clobber any possible pending updates
 		$update = JTable::getInstance('update');
-		$uid = $update->find(array('element' => $this->get('element'), 'type' => 'component', 'client_id' => '', 'folder' => ''));
+		$uid = $update->find(array('element' => $this->get('element'), 'type' => 'component', 'client_id' => 1, 'folder' => ''));
 
 		if ($uid)
 		{
@@ -1323,7 +1323,7 @@ public function uninstall($id)
 
 		// Clobber any possible pending updates
 		$update = JTable::getInstance('update');
-		$uid = $update->find(array('element' => $row->element, 'type' => 'component', 'client_id' => '', 'folder' => ''));
+		$uid = $update->find(array('element' => $row->element, 'type' => 'component', 'client_id' => 1, 'folder' => ''));
 
 		if ($uid)
 		{
@@ -1950,7 +1950,7 @@ public function discover_install()
 
 		// Clobber any possible pending updates
 		$update = JTable::getInstance('update');
-		$uid = $update->find(array('element' => $this->get('element'), 'type' => 'component', 'client_id' => '', 'folder' => ''));
+		$uid = $update->find(array('element' => $this->get('element'), 'type' => 'component', 'client_id' => 1, 'folder' => ''));
 
 		if ($uid)
 		{
diff --git a/libraries/joomla/installer/adapters/file.php b/libraries/joomla/installer/adapters/file.php
index 57ce2b6c1779e..c79772b02963d 100644
--- a/libraries/joomla/installer/adapters/file.php
+++ b/libraries/joomla/installer/adapters/file.php
@@ -254,9 +254,6 @@ public function install()
 				return false;
 			}
 
-			// Set the insert id
-			$row->set('extension_id', $db->insertid());
-
 			// Since we have created a module item, we add it to the installation step stack
 			// so that if we have to rollback the changes we can undo it.
 			$this->parent->pushStep(array('type' => 'extension', 'extension_id' => $row->extension_id));
diff --git a/libraries/joomla/installer/adapters/module.php b/libraries/joomla/installer/adapters/module.php
index 43b49726fc573..7c96f0a2f1254 100644
--- a/libraries/joomla/installer/adapters/module.php
+++ b/libraries/joomla/installer/adapters/module.php
@@ -427,9 +427,6 @@ public function install()
 				return false;
 			}
 
-			// Set the insert id
-			$row->extension_id = $db->insertid();
-
 			// Since we have created a module item, we add it to the installation step stack
 			// so that if we have to rollback the changes we can undo it.
 			$this->parent->pushStep(array('type' => 'extension', 'extension_id' => $row->extension_id));
diff --git a/libraries/joomla/installer/adapters/template.php b/libraries/joomla/installer/adapters/template.php
index 7220797b62a93..0d9347b79d9e4 100644
--- a/libraries/joomla/installer/adapters/template.php
+++ b/libraries/joomla/installer/adapters/template.php
@@ -284,17 +284,24 @@ public function install()
 
 		if ($this->route == 'install')
 		{
-			//insert record in #__template_styles
-			$query = $db->getQuery(true);
-			$query->insert('#__template_styles');
-			$query->set('template=' . $db->Quote($row->element));
-			$query->set('client_id=' . $db->Quote($clientId));
-			$query->set('home=0');
 			$debug = $lang->setDebug(false);
-			$query->set('title=' . $db->Quote(JText::sprintf('JLIB_INSTALLER_DEFAULT_STYLE', JText::_($this->get('name')))));
+			
+			$columns = array('template', 'client_id', 'home', 'title', 'params');
+			$values = array(
+				$db->Quote($row->element), $clientId, $db->Quote(0), 
+				$db->Quote(JText::sprintf('JLIB_INSTALLER_DEFAULT_STYLE', JText::_($this->get('name')))),
+				$db->Quote($row->params) );
+			
 			$lang->setDebug($debug);
-			$query->set('params=' . $db->Quote($row->params));
+			
+			//insert record in #__template_styles
+			$query = $db->getQuery(true);
+			$query->insert($db->quoteName('#__template_styles'))
+				->columns($columns)
+				->values(implode(',', $values));
+			
 			$db->setQuery($query);
+			
 			// There is a chance this could fail but we don't care...
 			$db->query();
 		}
@@ -359,7 +366,7 @@ public function uninstall($id)
 
 		// Deny remove default template
 		$db = $this->parent->getDbo();
-		$query = 'SELECT COUNT(*) FROM #__template_styles' . ' WHERE home = 1 AND template = ' . $db->Quote($name);
+		$query = "SELECT COUNT(*) FROM #__template_styles WHERE home = '1' AND template = " . $db->Quote($name);
 		$db->setQuery($query);
 
 		if ($db->loadResult() != 0)
@@ -412,13 +419,17 @@ public function uninstall($id)
 		}
 
 		// Set menu that assigned to the template back to default template
-		$query = 'UPDATE #__menu INNER JOIN #__template_styles' . ' ON #__template_styles.id = #__menu.template_style_id'
-			. ' SET #__menu.template_style_id = 0' . ' WHERE #__template_styles.template = ' . $db->Quote(strtolower($name))
-			. ' AND #__template_styles.client_id = ' . $db->Quote($clientId);
+
+		$query = 'UPDATE #__menu'
+			. ' SET template_style_id = 0'
+			. ' WHERE template_style_id in ('
+			. '	SELECT s.id FROM #__template_styles s'
+			. ' WHERE s.template = '. $db->Quote(strtolower($name)) .' AND s.client_id = '. $clientId .')';
+
 		$db->setQuery($query);
 		$db->Query();
 
-		$query = 'DELETE FROM #__template_styles' . ' WHERE template = ' . $db->Quote($name) . ' AND client_id = ' . $db->Quote($clientId);
+		$query = 'DELETE FROM #__template_styles WHERE template = ' . $db->Quote($name) . ' AND client_id = ' . $clientId;
 		$db->setQuery($query);
 		$db->Query();