Co sa mohlo stat s forom?

Po nabehnuti stranky s forom sa na obrazovke objavi tato informacia:

[phpBB Debug] PHP Notice: in file /includes/session.php on line 885: Cannot modify header information - headers already sent by (output started at /includes/hooks/index.php:251)
[phpBB Debug] PHP Notice: in file /includes/session.php on line 885: Cannot modify header information - headers already sent by (output started at /includes/hooks/index.php:251)
[phpBB Debug] PHP Notice: in file /includes/session.php on line 885: Cannot modify header information - headers already sent by (output started at /includes/hooks/index.php:251)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3391: Cannot modify header information - headers already sent by (output started at /includes/hooks/index.php:251)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3393: Cannot modify header information - headers already sent by (output started at /includes/hooks/index.php:251)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3394: Cannot modify header information - headers already sent by (output started at /includes/hooks/index.php:251)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3395: Cannot modify header information - headers already sent by (output started at /includes/hooks/index.php:251)

Az do dnes do vecera vsetko slapalo v pohode, nerobil som ziadny upgrade, a islo to na verzii, ktoru som si stahoval cca pred rokom. Moze byt, ze to niekto hackol? Alebo bude problem niekde inde. Vopred dakujem. Rasto.

Nahraj novy subor includes/hooks/index.php, resp. skontroluj, ci niekde (naspodu) nemas nieco neziadane, hocico, co nie je PHP.
Tiez si skontroluj ine index.php subory, stretol som sa s viacerymi forami, ktore mali do indexov popridavane rozne nezelane <script>y a pod.

Btw "cca pred rokom" je dost dlha doba, radil by som upgrade na najnovsiu verziu.

Dakujem ti clovece zlaty, bolo to presne ono, ten subor bol pozmeneny a vacsi ako ten instalacny. Vsetko zase slape. A s tou novou verziou to asi idem hned aj skusit. Velke dik. Rasto.