"There is no text on this page"

I'm struggling with a setting combination.

http://www.enworld.org/forum/forumdi...lic-Wiki-Pages

This forum has a bunch of wiki pages in it. While the forum has wiki set to disabled in the forum manager, the content shows fine. As soon as I switch it to enabled, each thread says it has no content.

I kinda screwed up because that forum was working fine, and another forum (the one I use for social group start pages) was refusing to show any content on those pages. So I went and moved all the threads in the second forum to the default forum and deleted the social group namespace. They worked, and then I tried setting the default forum to allow social group start pages and got the "No text on this page" issue with every page/thread. I couldn't get the text to show up again whatever combination of settings (forum, namespace, wiki settings - everywhere there are settings for Vaultwiki) until I disabled it again, at which point they all show just fine as normal forum threads.

Does that make any sense whatsoever?

I don't know if this is relevant (and I haven't been able to check them all - there are many) but the prefix "Update:" is appearing in front of non-functional wikipages.

[Edit - ignore that. It's not there now. Did I imagine it?]

Some pages work. I *think* they're the ones that were originally in that forum.

In AdminCP > Wiki URL Manager, click "Rebuild All URLs".

Thanks!