Y que te iba a decir, no puede ser un fallo del apache?
El suexec esta integrado con el apache, si kieres te paso el archivo del apache, me lo he mirado y veo cosas relacionadas con el exec y el CGI, pero no se que son, a ver que te parece:
ServerName calldebarcelona.org:80
ServerAlias
www.calldebarcelona.org
UseCanonicalName Off
SuexecUserGroup callde psacln
ServerAdmin "
[email protected]"
DocumentRoot /home/httpd/vhosts/calldebarcelona.org/httpdocs
CustomLog /home/httpd/vhosts/calldebarcelona.org/statistics/logs/access_log combined
ErrorLog /home/httpd/vhosts/calldebarcelona.org/statistics/logs/error_log
<IfModule mod_userdir.c>
UserDir /home/httpd/vhosts/calldebarcelona.org/web_users
</IfModule>
ScriptAlias /cgi-bin/ /home/httpd/vhosts/calldebarcelona.org/cgi-bin/
<IfModule mod_ssl.c>
SSLEngine off
</IfModule>
<Directory /home/httpd/vhosts/calldebarcelona.org/httpdocs>
<IfModule mod_perl.c>
<Files ~ (\.pl$)>
SetHandler perl-script
PerlHandler ModPerl::Registry
Options ExecCGI
allow from all
PerlSendHeader On
</Files>
</IfModule>
<IfModule mod_perl.c>
<Files ~ (\.asp$)>
SetHandler perl-script
PerlHandler Apache::ASP
PerlSetVar Global /tmp
</Files>
</IfModule>
<IfModule sapi_apache2.c>
php_admin_flag engine on
php_admin_value open_basedir "/home/httpd/vhosts/calldebarcelona.org/httpdocs:/tmp"
</IfModule>
<IfModule mod_python.c>
<Files ~ (\.py$)>
SetHandler python-program
PythonHandler mod_python.cgihandler
</Files>
</IfModule>
Options +Includes +ExecCGI
</Directory>
<Directory /home/httpd/vhosts/calldebarcelona.org/web_users>
<IfModule sapi_apache2.c>
AddType text/plain .php .php4 .php3 .phtml
php_admin_flag engine off
</IfModule>
</Directory>
<Directory "/home/httpd/vhosts/calldebarcelona.org/httpdocs/plesk-stat">
AuthType Basic
AuthName "EstadÃ*sticas de Dominio"
AuthUserFile /home/httpd/vhosts/calldebarcelona.org/pd/d..plesk-stat
require valid-user
</Directory>
Alias "/error_docs" "/home/httpd/vhosts/calldebarcelona.org/error_docs"
ErrorDocument 400 /error_docs/bad_request.html
ErrorDocument 403 /error_docs/forbidden.html
ErrorDocument 404 /error_docs/not_found.html
ErrorDocument 500 /error_docs/internal_server_error.html