I used K2 for some days and updated to K2 version 2.4.1. Now I am unable to publish articles. The following error appears, if I press the Save or the Apply-Button:Fatal error: Call to undefined function mb_regex_encoding() in /mnt/web1/23/10/52192710/htdocs/administrator/components/com_k2/tables/k2item.php on line 75I am working woth Mac OS X 10.6Webhoster: Strato (I know that's bad, already looking for another one)PHP5mySQL 5.0.67Please help me!ThanksDaniel