Installed K2 on new Joomla 1.5.15 install and I get white page when saving categories or importing content from Joomla. No other components installed, nor plugins or modules in Joomla. What is wrong ? I was so excited to discover K2, now all my hopes are gone ! Will publish debug messages right away.

Fatal error: Call to undefined function mb_regex_encoding() in /home/windowsf/public_html/j15/administrator/components/com_k2/tables/k2category.php on line 50.

This is what I get after adding a new category in K2 and pressing save.

nobody ? i even posted the debug message ... :(

sorry for this rant but no one cares really for helping me with my problem. I uninstalled k2 for good and will reccomend my friends not to use it because of poor (read not existing) support.

Allah Akbr

i have found it ;;;;

the solution
is to enable php extension called mbstring ;
it is in php.ini