How did you get back to the page where you added "[[meta-wiki]]"?
If you used the Back button in your browser, you need to refresh the page after creating the actual "meta-wiki" page.
cheers, -Nick
It doesn't seem to be a caching problem. I used Firefox's Live HTTP headers plugin to make sure the page was regenerated. Even when the page is regenerated it still has action=edit added to the link. There seems to be a problem with logic that determines whether or not to enable editing for a page.