class_postbit.php errors, please help

[Ramsesx]

I got this error one time opening a pm:
preg_replace(): Unknown modifier '/' in /includes/class_postbit.php(279) : eval()'d code on line 173
And one user reported this error:
Fatal error: Call to undefined function: process_pagetext() in /home/www/doc/xxx/xxxxx.de/www/forum/includes/class_postbit.php(251) : eval()'d code on line 3

Please can you give me a hint where I need to look? Thank you

[Paul M]

Both are errors in plugins you have installed. the first one is the hook postbit_display_complete, the other is the hook postbit_display_start.

[Ramsesx]

Thank you paul, seems to be Local_Link_Replacement hack.