following Falco's tutorial I set up a new domain, I'll call it www.john.com
and I tried to see the result when I hit my browser to www.john.com/info.php:
Title: 500 Internel Server Error
Message: Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, firstname.lastname@example.org and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
At my /var/log/apache2/error.log:
[Wed Aug 08 17:25:19 2012] [warn] [client xxx.xxx.xxx.xxx] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server, referer: http://www.john.com/
[Wed Aug 08 17:25:19 2012] [error] [client xxx.xxx.xxx.xxx] Premature end of script headers: info.php, referer: http://www.john.com/
From what I can see googling this error there is no simple solution or solution at all