Et bien le error.log, si j'en tire une séquence liée une même source IP :
mais je dois avouer que c'est un peu fouilli !
Sat Mar 01 15:47:10 2008] [error] [client 64.38.4.3] File does not exist: /home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs/components
[Sat Mar 01 15:47:10 2008] [error] [client 64.38.4.3] PHP Warning: main() [<a href='function.main'>function.main</a>]: open_basedir restriction in effect. File(/index.php) is not within the allowed path(s): (/home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs:/tmp:/usr/share/pear) in /home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs/i2/components/com_extcalendar/admin_events.php on line 29
[Sat Mar 01 15:47:10 2008] [error] [client 64.38.4.3] PHP Warning: main(/index.php) [<a href='function.main'>function.main</a>]: failed to open stream: Operation not permitted in /home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs/i2/components/com_extcalendar/admin_events.php on line 29
[Sat Mar 01 15:47:10 2008] [error] [client 64.38.4.3] PHP Warning: main() [<a href='function.main'>function.main</a>]: open_basedir restriction in effect. File(/index.php) is not within the allowed path(s): (/home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs:/tmp:/usr/share/pear) in /home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs/i2/components/com_extcalendar/admin_events.php on line 29
[Sat Mar 01 15:47:10 2008] [error] [client 64.38.4.3] PHP Warning: main(/index.php) [<a href='function.main'>function.main</a>]: failed to open stream: Operation not permitted in /home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs/i2/components/com_extcalendar/admin_events.php on line 29
[Sat Mar 01 15:47:10 2008] [error] [client 64.38.4.3] PHP Warning: main() [<a href='function.include'>function.include</a>]: Failed opening '/index.php' for inclusion (include_path='.:') in /home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs/i2/components/com_extcalendar/admin_events.php on line 29
[Sat Mar 01 15:47:10 2008] [error] [client 64.38.4.3] PHP Fatal error: Call to undefined function: require_priv() in /home/httpd/vhosts/innovnet.biz/subdomains/limogesparks/httpdocs/i2/components/com_extcalendar/admin_events.php on line 106
edit: Un gentil modo a ajouté la balise [fixed] pour afficher tout ça proprement. Merci d'en prendre de la graine.