[Detective]

I also have this in my .htaccess:

# BEGIN ANTISPAMBLOG REGISTRATION

RewriteEngine On

RewriteCond %{REQUEST_METHOD} POST

RewriteCond %{REQUEST_URI} .register.php*

RewriteCond %{HTTP_REFERER} !.*ryuuko.cl.* [OR]

RewriteCond %{HTTP_USER_AGENT} ^$

RewriteRule (.*) http://www.dii.uchile.cl/ [R=301,L]

# END ANTISPAMBLOG REGISTRATION

The dii.uchile.cl url is an internal joke