I added a new feature this evening. If wp-cache-phase1.php hasn’t been loaded when the settings page loads the plugin will recreate advanced-cache.php and fix the WPCACHEHOME constant in wp-config.php.
It does check if caching is enabled as part of that check but if there’s an error in advanced-cache.php it should be caught!
I’m nervous about tomorrow’s release. Getting people to test the plugin is hard and when a release is made suddenly tens of thousands of sites are running brand new code. *gulp*