Actually, it *has* been mentioned, (I posted on it myself this morning), but since my post is off hte main page, you wouldn't see it :)
What you're seeing is XML errors. (Especially if you're using older versions of IE.) They've already said they know about this and are working to resolve it, but yes, the forum search isn't working right now.
That's the trouble with setting the server to send XML as Content-Type: application/xhtml+xml;
any errors completely screw the page.
Exactly. However, you should never put content type for XML pages as anything *but* XML, because XML is not the same as XHTML and HTML. XML documents should never be served up as text/html. (There's a debate on whether XHTML documents should be served up in that manner, as well.)
But anyway, it's being worked on :)