WP 3.4.2
PHP Version 5.3.19
Mysql 5.5.28
I attach the log file
[Sun Jan 27 13:18:33 2013] [error] [client xxx.27.xx.86:6xxxx] - http://www.mysite.it - End of script output before headers: playlist.php, referer http://www.mysite.it/pagina-di-esempio/
[Sun Jan 27 13:18:33 2013] [error] [client xxx.27.xx.86:6xxxx] - http://www.mysite.it - AH01215: suexec policy violation: see suexec log for more details, referer http://www.mysite.it/pagina-di-esempio/
[Sun Jan 27 13:18:33 2013] [error] [[client xxx.27.xx.86:6xxxx] - http://www.mysite.it - End of script output before headers: config.php, referer http://www.mysite.it/pagina-di-esempio/
[Sun Jan 27 13:18:33 2013] [error] [client xxx.27.xx.86:6xxxx] - http://www.mysite.it - AH01215: suexec policy violation: see suexec log for more details, referer http://www.mysite.it/pagina-di-esempio/
[Sun Jan 27 13:14:48 2013] [error] [client 151.27.181.86:63358] - http://www.mysite.it - End of script output before headers: generator.php, referer http://www.mysite.it/wp-admin/post-new.php
[Sun Jan 27 13:14:48 2013] [error] [client xxx.27.xx.86:6xxxx] - http://www.mysite.it - AH01215: suexec policy violation: see suexec log for more details, referer http://www.mysite.it/wp-admin/post-new.php
[Sun Jan 27 13:14:46 2013] [error] [client 151.27.181.86:63305] - http://www.mysite.it - End of script output before headers: generator.php, referer http://www.mysite.it/wp-admin/post-new.php
[Sun Jan 27 13:14:46 2013] [error] [client xxx.27.xx.86:6xxxx] - http://www.mysite.it - AH01215: suexec policy violation: see suexec log for more details, referer http://www.mysite.it/wp-admin/post-new.php
in other servers no problem