Novo Joomla 1.5.9
TheJoomla Project announces the immediate availability of Joomla 1.5.9 [Vatani]. This is a security release and users are strongly encouraged to upgrade immediately.
It has been around two months since Joomla 1.5.8 was released on November 10, 2008. The Development Working Group's goal is to continue to provide regular, frequent updates to the Joomla community.
Mais uma atualização a frente, você pode ler todo o release nesse link.
Acho que essa semana posto sobre um componente que se dispõe a fazer auto update do Joomla, com essa nova versão vou testá-lo.