Hi all, 
after moving a new 2.5 install to a different server, I always get this error message in the backend: 
Unrecognized HTTP host: 'subdomain.mydomain.tld' - Please update your $config->httpHosts setting in /site/config.php
The entry in config.php contained the new domain when I installed. 
Then I set the entry to an empty array. 
$config->httpHosts = array('');
But the error still displays in the backend. 
How can I get rid of it?