Also, it looks like you're using MediaWiki 1.3.x. 1.4 has been
released, and now supports the MonoBook skin when using PHP 5.
-- Zigger
On 4/15/05, wrote:
...
# PHP 5.0.3: the MonoBook skin will be disabled due to an
incompatibility between the PHPTAL template library and PHP 5. The wiki
should function normally, but with the older look and feel.
...