Thread:Extension talk:WYSIWYG/WYSIWYG works by IP but not by URL/reply

I've worked around that with mod_rewrite in Apache.

RewriteEngine on       RewriteCond %{HTTP_HOST}   ^wiki\.specialdomain\.com [NC] RewriteRule ^/(.*)        http://10.10.10.123/$1 [L,R]

Still no notion what the underlying problem is.