Tim Starling wrote:
In 1.2, only the internal messages from the MediaWiki namespace were cached. In 1.3, custom messages are moved to the Template namespace and the whole namespace is cached. [...] The first web request after that should then cache the namespace successfully.
Why exactly are you trying to cache the entire namespace on a single Web request? Shouldn't you cache only those that the Web request actually requested? In other words, it should not have tried to cache all the templates in the MediaWiki namespace, but only those that were actually used by the Web requests. I would have thought this is the purpose of a cache: to store that which is commonly or recently accessed.
Timwi