Guys

Hopefully not a too difficult one for a stunning autumn Thursday...

I have read and reread the devmode, debug and other pages on the wiki and am not totally sure of the correct/best setup of the _config.php file for a live site.

My main issue is that if I remove the Director::set_dev_servers directive as suggested in the devmode page
ie as below:

xxx
// Sites running on the following servers will be
// run in development mode. See
// http://doc.silverstripe.com/doku.php?id=devmode
// for a description of what dev mode does.
//Director::set_dev_servers(array(
// '127.0.01',
// 'localhost'
//));

Director::set_environment_type("live");
xxx

I get the following error repeated multiple times in the Apache logfile:

PHP Notice: Undefined index: HTTP_HOST in .../sapphire/core/control/Director.php on line 482

This message also is reported on lines 487, 224 of the Director.php and on line line 29 of .../sapphire/core/control/RootURL/Controller.php

I thought setting the Director::set_evironment_type() to live might override the use of the set_dev_servers() but it does not seem to.

Any thoughts on what a secure, working _config.php should look like for a live (internet facing) site that does not fill the apache logfiles with PHP errors?

Cheers
Jim