Magento: PHP Extensions "0" must be loaded.

Ошибка во время установки Magento PHP Extensions "0" must be loaded.
Решение следующее:

Replace in file app/code/core/Mage/Install/etc/config.xml (near 71th string) this

<extensions>
    <pdo_mysql/>
</extensions>

with this

<extensions>
    <pdo_mysql>1</pdo_mysql>
</extensions>