suexec-custom checks cannot be disabled

Binary package hint: apache2

apache2-suexec-custom:
  Installed: 2.2.14-5ubuntu8.3

apache2-suexec-custom claims in /etc/apache2/suexec/www-data that
  # The first two lines contain the suexec document root and the suexec userdir
  # suffix. Both features can be disabled separately by prepending a # character.
  # This config file is only used by the apache2-suexec-custom package.

however the actual suexec binary will not allow for the override --- simply prepending by a # character gives errors, e.g.,
/var/log/apache2/error.log:
  [Tue Nov 09 15:50:21 2010] [warn] FastCGI: (dynamic) server "/srv/website1/.fcgi-bin/php5.fcgi" (pid 9279) terminated by calling exit with status '127'
/var/log/apache2/suexec.log:
  [2010-11-09 15:50:21]: docroot disabled in /etc/apache2/suexec/www-data

Since the feature cannot be disabled by prepending a # character --- simply read the source to see that this is the case --- I recommend changing the documentation to remove any mention of disabling the feature.