[Mediawiki-l] Troubles with MediaWiki namespace

[Timwi]

Hello,

I have been informed that this mailing list exists to discuss MediaWiki 
separate from Wikipedia. Thank you to Angela for pointing this out.

So, I'll re-post my question here.

I'm trying to use the MediaWiki namespace on my new installation of 
MediaWiki.

Unfortunately, {{msg:Blah}} is being replaced by nothing (i.e. it is 
just being removed) even though [[MediaWiki:Blah]] does contain text.

What might the cause of this be?

Thanks for any help,
Timwi