I have been having a problem with the auto-update function malfunctioning (goes to a blank page and does NOT save anything). I believe it is due to my webhost's restrictions on php which cannot be overridden.
I searched these forums and came across the Modify AutoSave Interval section of the codex. I thought this might solve my problem - I could adjust the time between auto-saves to several minutes.
define('AUTOSAVE_INTERVAL', 160 ); // seconds
But this coding does NOT appear on WP2.7's wp-config.php. Which file contains this coding?