[Mediawiki-l] Forcing a single skin for a site

[Ken McDonald]

We've developed a thematic skin for our (commercial) site, and would 
like to make it *the* skin, i.e. there will be no other choices, and 
even current users with a different skin will find themselves using the 
new skin the next time they log in. What is the best way to do this? 
I've set the 'wgDefaultSkin' variable, but it won't affect current users 
(I imagine), and in any case it doesn't force a single skin.

Thanks,
Ken