Support for multilanguage sites, Internationalization (I18N)

[polyfragmented]

Works for me. Maybe you have custom rewrite rules in your .htaccess?
Are the navigation links correct?

Not using any rewrite rules other than the default. Are the navigation links correct? I can only tell you that they follow the default scheme for fancy URLs in the backend. It works for any other top-level navi entry and its children here.

The .htaccess looks like this:

AddDefaultCharset UTF-8
Options -Indexes

# Added by Thorsten, 20110419-1620
AddHandler php53-cgi .php

# blocks direct access to the XML files - they hold all the data!
<Files ~ "\.xml$">
Order allow,deny
Deny from all
Satisfy All
</Files>
<Files sitemap.xml>
Order allow,deny
Allow from all
Satisfy All
</Files>

RewriteEngine on

# Usually it RewriteBase is just '/', but
# replace it with your subdirectory path
RewriteBase '/'

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule /?([A-Za-z0-9_-]+)/?$ index.php?id=$1 [QSA,L]

This is the vanilla default (as far as I can tell) with one addition for PHP CGI mode, but no extra rewrite rules

Aren't you using any caching plugin maybe ?
Try also with url structure without parent, only %slug%

Not using any caching plugin at all. Without %parent% it works, but this is not what I want. I'd like to use the system's default which is %parent%/%slug%/. As mentioned above in reply to mvlcek, it works for any other top-level navi entry and it's children.