ansval

HOla instale en local el joomla 1.6 y sale el siguiente error

Strict Standards: Declaration of ContentModelArticle::cleanCache() should be compatible with that of JModel::cleanCache() in C:\xampp\htdocs\joomla16\administrator\components\ com_content\models\article.php on line 25

Strict Standards: Only variables should be assigned by reference in C:\xampp\htdocs\joomla16\libraries\joomla\form\for m.php on line 865

Strict Standards: Only variables should be assigned by reference in C:\xampp\htdocs\joomla16\libraries\joomla\form\for m.php on line 865
y en el menu al entrar en una categoria me sale el siguiente error:
Strict Standards: Declaration of MenusModelItem::cleanCache() should be compatible with that of JModel::cleanCache() in C:\xampp\htdocs\joomla16\administrator\components\ com_menus\models\item.php on line 23

Que es lo que esta mal? vale la pena volver a instalar uno nuevo o como puedo corregirlo gracias