diff --git a/installation/sql/postgresql/joomla.sql b/installation/sql/postgresql/joomla.sql
index 361730d261f8a..26aecf73a3430 100644
--- a/installation/sql/postgresql/joomla.sql
+++ b/installation/sql/postgresql/joomla.sql
@@ -1842,7 +1842,7 @@ CREATE TABLE "#__modules" (
   "module" character varying(50) DEFAULT NULL,
   "access" bigint DEFAULT 0 NOT NULL,
   "showtitle" smallint DEFAULT 1 NOT NULL,
-  "params" text NOT NULL,
+  "params" text DEFAULT '' NOT NULL,
   "client_id" smallint DEFAULT 0 NOT NULL,
   "language" character varying(7) NOT NULL,
   PRIMARY KEY ("id")
diff --git a/libraries/joomla/database/database/postgresql.php b/libraries/joomla/database/database/postgresql.php
index bb516dcd31f1c..c79f7ab04dc2e 100644
--- a/libraries/joomla/database/database/postgresql.php
+++ b/libraries/joomla/database/database/postgresql.php
@@ -447,6 +447,8 @@ public function insertid()
 	public function insertObject($table, &$object, $key = null)
 	{
 		// Initialise variables.
+		$columns = $this->getTableColumns($table);
+
 		$fields = array();
 		$values = array();
 
@@ -467,7 +469,7 @@ public function insertObject($table, &$object, $key = null)
 
 			// Prepare and sanitize the fields and values for the database query.
 			$fields[] = $this->quoteName($k);
-			$values[] = is_numeric($v) ? $v : $this->quote($v);
+			$values[] = $this->sqlValue($columns, $k, $v);
 		}
 
 		// Create the base insert statement.
@@ -1043,6 +1045,62 @@ public function replacePrefix($sql, $prefix = '#__')
 		return $replacedQuery;
 	}
 
+	/**
+	 * This function return a field value as a prepared string to be used in a SQL statement.
+	 *
+	 * @param   string  $columns       The array of field columns returned by JDatabasePostgreSQL::getTableColumns.
+	 * @param   string  $field_name    Name of field that will receive the converted SQL value
+	 * @param   string  $field_value   Php variable value to be converted to SQL.
+	 * 
+	 * @return  string  The quoted string.
+	 *
+	 * @since   11.3
+	 */
+	protected function sqlValue(&$columns, $field_name, $field_value)
+	{
+		switch ($columns[$field_name])
+		{
+			case 'boolean':
+				if ($field_value == 't')
+				{
+					$val = 'TRUE';
+				}
+				elseif ($field_value == 'f')
+				{
+					$val = 'FALSE';
+				}
+				elseif (is_bool($field_value))
+				{
+					$val = $field_value ? 'TRUE' : 'FALSE';
+				}
+				else
+				{
+					$val = 'NULL';
+				}
+				break;
+			case 'bigint':
+			case 'bigserial':
+			case 'integer':
+			case 'money':
+			case 'real':
+			case 'smallint':
+			case 'serial':
+			case 'numeric':
+				$val = strlen($field_value) == 0 ? 'NULL' : strval($field_value);
+				break;
+			case 'date':
+			case 'timestamp without time zone':
+				if (empty($field_value))
+				{
+					$field_value = $this->getNullDate();
+				}
+			default:
+				$val = $this->quote($field_value);
+		}
+
+		return $val;
+	}
+
 	/**
 	 * Method to commit a transaction.
 	 *
@@ -1154,6 +1212,8 @@ public function unlockTables()
 	public function updateObject($table, &$object, $key, $nulls = false)
 	{
 		// Initialise variables.
+		$columns = $this->getTableColumns($table);
+		
 		$fields = array();
 		$where = '';
 
@@ -1174,7 +1234,8 @@ 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) . '=' . (is_numeric($v) ? $v : $this->quote($v));
+				$key_val = $this->sqlValue($columns, $k, $v);
+				$where = $this->quoteName($k) . '=' . $key_val;
 				continue;
 			}
 
@@ -1192,10 +1253,9 @@ public function updateObject($table, &$object, $key, $nulls = false)
 					continue;
 				}
 			}
-			// The field is not null so we prep it for update.
 			else
 			{
-				$val = (is_numeric($v) ? $v : $this->quote($v));
+				$val = $this->sqlValue($columns, $k, $v);
 			}
 
 			// Add the field to be updated.
diff --git a/libraries/joomla/database/table/menu.php b/libraries/joomla/database/table/menu.php
index a0c78a77b961d..304caa909887c 100644
--- a/libraries/joomla/database/table/menu.php
+++ b/libraries/joomla/database/table/menu.php
@@ -145,7 +145,10 @@ public function store($updateNulls = false)
 		$db = JFactory::getDBO();
 		// Verify that the alias is unique
 		$table = JTable::getInstance('Menu', 'JTable');
-		if ($table->load(array('alias' => $this->alias, 'parent_id' => $this->parent_id, 'client_id' => $this->client_id, 'language' => $this->language))
+		
+		$clientId = strlen($this->client_id) == 0 ? 0 : $this->client_id;
+		 
+		if ($table->load(array('alias' => $this->alias, 'parent_id' => $this->parent_id, 'client_id' => $clientId, 'language' => $this->language))
 			&& ($table->id != $this->id || $this->id == 0))
 		{
 			if ($this->menutype == $table->menutype)
diff --git a/libraries/joomla/installer/adapters/component.php b/libraries/joomla/installer/adapters/component.php
index 88c57419ee636..7d9f17121d010 100644
--- a/libraries/joomla/installer/adapters/component.php
+++ b/libraries/joomla/installer/adapters/component.php
@@ -541,7 +541,7 @@ public function install()
 			return false;
 		}
 
-		$eid = $row->$key;
+		$eid = $row->extension_id;
 
 		// Clobber any possible pending updates
 		$update = JTable::getInstance('update');
diff --git a/libraries/joomla/installer/adapters/language.php b/libraries/joomla/installer/adapters/language.php
index adcd514c78fbf..34140ba26b786 100644
--- a/libraries/joomla/installer/adapters/language.php
+++ b/libraries/joomla/installer/adapters/language.php
@@ -283,7 +283,7 @@ protected function _install($cname, $basePath, $clientId, &$element)
 
 		// Clobber any possible pending updates
 		$update = JTable::getInstance('update');
-		$uid = $update->find(array('element' => $this->get('tag'), 'type' => 'language', 'client_id' => '', 'folder' => ''));
+		$uid = $update->find(array('element' => $this->get('tag'), 'type' => 'language', 'client_id' => $clientId, 'folder' => ''));
 		if ($uid)
 		{
 			$update->delete($uid);