No arquivo config.xml que se encontra no diretorio citado acima, reescreva o arquivo enviando o arquivo original, config.xml e vá no diretorio var/cache e exclua todos os arquivos e diretorios que existem lá.
segue o link do post original com o texto do [ANDI222] dando a explicação boa sorte.
http://www.magentocommerce.com/boards/viewthread/76829/
The problem is in /public_html/app/code/core/Mage/Cms/etc/
By uploading a new theme may influence the file config.xml
I rewrote the config file and cleared all the cache from var/cache (just delete all the files and folders)
It works great now.
Anyway it is frustrating that a new copy of the last version needs all this king of stress.
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