error on registration

[RedeemedWarrior]

Warning: strpos() [function.strpos]: Empty delimiter in [path]/includes/class_dm_user.php(2939) : eval()'d code on line 11

any idea what that could be? it appears above header on registration

and this appeared instead of welcome message

Unable to add cookies, header already sent.
File: /******/public_html/********/forums/includes/class_core.php
Line: 3254

just started since i updated to 3.8

[Dismounted]

This is most likely caused by a modification. To see if this is the case, add this to the end of your config.php:
define('DISABLE_HOOKS', true);

[RedeemedWarrior]

i found it now, was by a mod to stop spam links

Thanks for your help

oops it was this
(https://vborg.vbsupport.ru/showthread.php?t=134778&page=8&highlight=spam)
the error had already been reported... gah will teach me for not reading whole thread!