Update: This has been sorted. Thanks.
A server with one of my sites on it is upgrading to PHP 5. When we do so, this site turns into an HTTP 500 Internal Server Error. register_globals is on. The site runs on a PHP script that isn’t available and hasn’t been maintained, so I’m sure that has everything to do with it, but are there any common reasons that this would happen? I’m not a programmer at all, of course.
I appreciate any suggestions.